annotate src/implab/safe.js @ 22:60f6493e2892

Added projection property to djol/VectorStore
author cin
date Wed, 06 Dec 2017 11:48:39 +0300
parents 8332e287d552
children 8af8e840dd49
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1 define([],
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2
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3 function () {
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4 var _create = Object.create,
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5 _keys = Object.keys;
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6
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7 var safe = null;
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8 safe = {
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9 argumentNotNull: function (arg, name) {
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10 if (arg === null || arg === undefined)
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11 throw new Error("The argument " + name + " can't be null or undefined");
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12 },
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13
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14 argumentNotEmptyString: function (arg, name) {
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15 if (typeof (arg) !== "string" || !arg.length)
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16 throw new Error("The argument '" + name + "' must be a not empty string");
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17 },
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18
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19 argumentNotEmptyArray: function (arg, name) {
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20 if (!(arg instanceof Array) || !arg.length)
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21 throw new Error("The argument '" + name + "' must be a not empty array");
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22 },
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23
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24 argumentOfType: function (arg, type, name) {
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25 if (!(arg instanceof type))
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26 throw new Error("The argument '" + name + "' type doesn't match");
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27 },
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28
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29 isNull: function (arg) {
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30 return (arg === null || arg === undefined);
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31 },
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32
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33 isPrimitive: function (arg) {
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34 return (arg === null || arg === undefined || typeof (arg) === "string" ||
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35 typeof (arg) === "number" || typeof (arg) === "boolean");
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36 },
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37
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38 isInteger: function (arg) {
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39 return parseInt(arg) == arg;
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40 },
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41
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42 isNumber: function (arg) {
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43 return parseFloat(arg) == arg;
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44 },
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45
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46 isString: function (val) {
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47 return typeof (val) == "string" || val instanceof String;
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48 },
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49
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50 isNullOrEmptyString: function (str) {
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51 if (str === null || str === undefined ||
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52 ((typeof (str) == "string" || str instanceof String) && str.length === 0))
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53 return true;
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54 },
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55
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56 isNotEmptyArray: function (arg) {
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57 return (arg instanceof Array && arg.length > 0);
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58 },
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59
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60 /**
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61 * Выполняет метод для каждого элемента массива, останавливается, когда
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62 * либо достигнут конец массива, либо функция <c>cb</c> вернула
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63 * значение.
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64 *
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65 * @param{Array | Object} obj массив элементов для просмотра
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66 * @param{Function} cb функция, вызываемая для каждого элемента
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67 * @param{Object} thisArg значение, которое будет передано в качестве
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68 * <c>this</c> в <c>cb</c>.
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69 * @returns Результат вызова функции <c>cb</c>, либо <c>undefined</c>
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70 * если достигнут конец массива.
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71 */
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72 each: function (obj, cb, thisArg) {
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73 safe.argumentNotNull(cb, "cb");
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74 var i, x;
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75 if (obj instanceof Array) {
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76 for (i = 0; i < obj.length; i++) {
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77 x = cb.call(thisArg, obj[i], i);
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78 if (x !== undefined)
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79 return x;
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80 }
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81 } else {
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82 var keys = _keys(obj);
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83 for (i = 0; i < keys.length; i++) {
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84 var k = keys[i];
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85 x = cb.call(thisArg, obj[k], k);
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86 if (x !== undefined)
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87 return x;
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88 }
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89 }
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90 },
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91
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92 /**
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93 * Копирует свойства одного объекта в другой.
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94 *
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95 * @param{Any} dest объект в который нужно скопировать значения
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96 * @param{Any} src источник из которого будут копироваться значения
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97 * @tmpl{Object|Array} tmpl шаблон по которому будет происходить
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98 * копирование. Если шаблон является массивом
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99 * (список свойств), тогда значения этого массива
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100 * являются именами свойсвт которые будут
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101 * скопированы. Если шаблон является объектом (карта
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102 * преобразования имен свойств src->dst), тогда
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103 * копирование будет осуществляться только
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104 * собственных свойств источника, присутсвующих в
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105 * шаблоне, при этом значение свойства шаблона
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106 * является именем свойства в которое будет
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107 * произведено коприрование
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108 */
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109 mixin: function (dest, src, tmpl) {
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110 safe.argumentNotNull(dest, "dest");
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111 if (!src)
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112 return dest;
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113
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114 var keys, i, p;
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115 if (arguments.length < 3) {
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116 keys = _keys(src);
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117 for (i = 0; i < keys.length; i++) {
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118 p = keys[i];
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119 dest[p] = src[p];
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120 }
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121 } else {
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122 if (tmpl instanceof Array) {
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123 for (i = 0; i < tmpl.length; i++) {
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124 p = tmpl[i];
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125 if (p in src)
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126 dest[p] = src[p];
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127 }
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128
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129 } else {
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130 keys = _keys(src);
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131 for (i = 0; i < keys.length; i++) {
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132 p = keys[i];
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133 if (p in tmpl)
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134 dest[tmpl[p]] = src[p];
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135 }
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136 }
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137 }
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138 return dest;
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139 },
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140
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141 /** Wraps the specified function to emulate an asynchronous execution.
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142 * @param{Object} thisArg [Optional] Object which will be passed as 'this' to the function.
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143 * @param{Function|String} fn [Required] Function wich will be wrapped.
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144 */
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145 async: function (fn, thisArg) {
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146 if (arguments.length == 2 && !(fn instanceof Function))
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147 fn = thisArg[fn];
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148
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149 if (fn == null)
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150 throw new Error("The function must be specified");
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151
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152 function wrapresult(x, e) {
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153 if (e) {
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154 return {
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155 then: function (cb, eb) {
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156 try {
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157 return eb ? wrapresult(eb(e)) : this;
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158 } catch (e2) {
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159 return wrapresult(null, e2);
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160 }
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161 }
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162 };
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163 } else {
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164 if (x && x.then)
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165 return x;
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166 return {
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167 then : function(cb) {
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168 try {
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169 return cb ? wrapresult(cb(x)) : this;
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170 } catch(e2) {
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171 return wrapresult(e2);
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172 }
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173 }
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174 };
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175 }
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176 }
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177
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178 try {
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179 return wrapresult(fn.apply(thisArg, arguments));
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180 } catch (e) {
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181 return wrapresult(null, e);
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182 };
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183 },
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184
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185 create: function () {
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186 if (console && console.warn)
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187 console.warn("implab/safe::create is deprecated use Object.create instead");
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188 _create.apply(this, arguments);
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189 },
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190
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191 delegate: function (target, method) {
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192 if (!(method instanceof Function)) {
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193 this.argumentNotNull(target, "target");
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194 method = target[method];
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195 }
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196
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197 if (!(method instanceof Function))
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198 throw new Error("'method' argument must be a Function or a method name");
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199
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200 return function () {
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201 return method.apply(target, arguments);
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202 };
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203 },
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204
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205 /**
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206 * Для каждого элемента массива вызывает указанную функцию и сохраняет
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207 * возвращенное значение в массиве результатов.
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208 *
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209 * @remarks cb может выполняться асинхронно, при этом одновременно будет
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210 * только одна операция.
fc2517695ee1 Initial commit, draft import of existing work
cin
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211 *
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cin
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212 * @async
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cin
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213 */
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cin
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214 pmap: function (items, cb) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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215 safe.argumentNotNull(cb, "cb");
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cin
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216
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
217 if (items && items.then instanceof Function)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
218 return items.then(function (data) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
219 return safe.pmap(data, cb);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
220 });
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
221
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
222 if (safe.isNull(items) || !items.length)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
223 return items;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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224
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
225 var i = 0,
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cin
parents:
diff changeset
226 result = [];
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cin
parents:
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227
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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228 function next() {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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229 var r, ri;
fc2517695ee1 Initial commit, draft import of existing work
cin
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230
fc2517695ee1 Initial commit, draft import of existing work
cin
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231 function chain(x) {
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cin
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232 result[ri] = x;
fc2517695ee1 Initial commit, draft import of existing work
cin
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233 return next();
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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234 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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235
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
236 while (i < items.length) {
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cin
parents:
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237 r = cb(items[i], i);
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cin
parents:
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238 ri = i;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
239 i++;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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240 if (r && r.then) {
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cin
parents:
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241 return r.then(chain);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
242 } else {
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cin
parents:
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243 result[ri] = r;
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cin
parents:
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244 }
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cin
parents:
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245 }
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cin
parents:
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246 return result;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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247 }
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cin
parents:
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248
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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249 return next();
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
250 },
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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251
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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252 /**
fc2517695ee1 Initial commit, draft import of existing work
cin
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253 * Для каждого элемента массива вызывает указанную функцию, результаты
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cin
parents:
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254 * не сохраняются
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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255 *
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
256 * @remarks cb может выполняться асинхронно, при этом одновременно будет
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
257 * только одна операция.
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
258 * @async
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cin
parents:
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259 */
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
260 pfor: function (items, cb) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
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261 safe.argumentNotNull(cb, "cb");
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
262
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
263 if (items && items.then instanceof Function)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
264 return items.then(function (data) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
265 return safe.pmap(data, cb);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
266 });
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
267
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
268 if (safe.isNull(items) || !items.length)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
269 return items;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
270
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
271 var i = 0;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
272
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
273 function next() {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
274 while (i < items.length) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
275 var r = cb(items[i], i);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
276 i++;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
277 if (r && r.then)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
278 return r.then(next);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
279 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
280 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
281
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
282 return next();
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
283 },
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
284
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
285 /**
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
286 * Выбирает первый элемент из последовательности, или обещания, если в
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
287 * качестве параметра используется обещание, оно должно вернуть массив.
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
288 *
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
289 * @param{Function} cb обработчик результата, ему будет передан первый
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
290 * элемент последовательности в случае успеха
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
291 * @param{Fucntion} err обработчик исключения, если массив пустой, либо
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
292 * не массив
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
293 *
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
294 * @remarks Если не указаны ни cb ни err, тогда функция вернет либо
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
295 * обещание, либо первый элемент.
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
296 * @async
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
297 */
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
298 first: function (sequence, cb, err) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
299 if (sequence) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
300 if (sequence.then instanceof Function) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
301 return sequence.then(function (res) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
302 return safe.first(res, cb, err);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
303 }, err);
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
304 } else if (sequence && "length" in sequence) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
305 if (sequence.length === 0) {
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
306 if (err)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
307 return err(new Error("The sequence is empty"));
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
308 else
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
309 throw new Error("The sequence is empty");
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
310 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
311 return cb ? cb(sequence[0]) : sequence[0];
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
312 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
313 }
3
00779cb63b12 formatting
cin
parents: 0
diff changeset
314
0
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
315 if (err)
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
316 return err(new Error("The sequence is required"));
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
317 else
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
318 throw new Error("The sequence is required");
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
319 }
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
320 };
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
321
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
322 return safe;
fc2517695ee1 Initial commit, draft import of existing work
cin
parents:
diff changeset
323 });