//JS判断数组中是否包含某一项
Array.prototype.contains = function(obj){ var i = this.length; while (i--){ if (this[i] === obj){ return true; } } return false; } //JS判断某一项是否在数组中
function contains(str) { var array = [' ','1','2','3','4','5','6','7','8','9','0','.','+','-','*','/','(',')']; for(var i = 0;i < array.length;i++) { if(array[i] == str) { return true; } } return false; } |
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