取消Extension改为linq.List以避免forin污染
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@@ -255,7 +255,7 @@ class ArrayUtils {
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* @param item
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*/
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public static addIfNotPresent<T>(list: T[], item: T) {
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if (list.contains(item))
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if (new linq.List(list).contains(item))
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return false;
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list.push(item);
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