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JavaScript數組some()方法測試數組中的某個元素是否通過由提供的功能來實現測試。
文法
array.some(callback[, thisObject]);
下面是參數的詳細資料：
傳回值:
如果某些元素通過測試則返回true，否則為false。
相容性：
這個方法是一個JavaScript擴充到ECMA-262標準; 因此它可能不存在在標準的其他實現。為了使它工作，你需要添加下面的腳本代碼放到頂部：
if (!Array.prototype.some){ Array.prototype.some = function(fun /*, thisp*/) { var len = this.length; if (typeof fun != "function") throw new TypeError(); var thisp = arguments[1]; for (var i = 0; i < len; i++) { if (i in this && fun.call(thisp, this[i], i, this)) return true; } return false; };}
例子：
<html><head><title>JavaScript Array some Method</title></head><body><script type="text/javascript">if (!Array.prototype.some){ Array.prototype.some = function(fun /*, thisp*/) { var len = this.length; if (typeof fun != "function") throw new TypeError(); var thisp = arguments[1]; for (var i = 0; i < len; i++) { if (i in this && fun.call(thisp, this[i], i, this)) return true; } return false; };}function isBigEnough(element, index, array) { return (element >= 10);}var retval = [2, 5, 8, 1, 4].some(isBigEnough);document.write("Returned value is : " + retval );var retval = [12, 5, 8, 1, 4].some(isBigEnough);document.write("<br />Returned value is : " + retval );</script></body></html>
這將產生以下結果：
Returned value is : falseReturned value is : true
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