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1 using System;
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2 using System.Collections.Generic;
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3
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4 using JetBrains.Annotations;
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5
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6 namespace BLToolkit.Linq
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7 {
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8 public static class Extensions
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9 {
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10 public static IEnumerable<TResult> Zip<TFirst,TSecond,TResult>(
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11 [NotNull] this IEnumerable<TFirst> first,
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12 [NotNull] IEnumerable<TSecond> second,
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13 [NotNull] Func<TFirst,TSecond,TResult> resultSelector)
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14 {
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15 if (first == null) throw new ArgumentNullException("first");
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16 if (second == null) throw new ArgumentNullException("second");
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17 if (resultSelector == null) throw new ArgumentNullException("resultSelector");
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18
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19 using (var e1 = first.GetEnumerator())
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20 using (var e2 = second.GetEnumerator())
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21 while (e1.MoveNext() && e2.MoveNext())
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22 yield return resultSelector(e1.Current, e2.Current);
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23 }
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24 }
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25 }
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