標籤:Two SumGiven an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please
標籤:Shortest PalindromeGiven a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation.For example:Given "aacecaaa",
標籤:原先文章中提到的偽類繼承,超類的建構函式會被執行兩次,所以效率上會有點問題,看了進階程式之後,發現原來還可以改進,只需要用一個函數來實現繼承即可。 function inherit(subClass, superClass) { function F() {} //建立臨時建構函式 F.prototype = superClass.prototype //將超類的原型作為臨時建構函式的原型 var prototype = new F() //執行個體化臨時函數,
標籤:javascript scope chain scope chain一個函數有一個scope chain 函數每調用一次,該函數的scope上建立一個對象,函數的局部變數被當做屬性賦值給這個新對象。 所以對嵌套函數function A() { var a = ‘A‘; function B() { var b = ‘B‘ } function C()
JavaScript資料類型、類型檢測函數——慕課網ArraysSimilar編程練習基本類型stringnumberbooleanfunctionundefinedobject (null,Array,Date,window)隱式轉換與“==”“===”num-string var str=num+‘ ’ string-num var
js擷取頁面description的方法,js擷取description本文執行個體講述了js擷取頁面description的方法。分享給大家供大家參考。具體實現方法如下:var meta = pt.document.getElementsByTagName('meta');var share_desc = '';for(i in meta){ if(typeof
jQuery擷取上傳檔案的名稱的Regex,jqueryRegex方法一:$('input[type="file"]').on('change', function() { var reg = /[^\\\/]*[\\\/]+/g; //匹配檔案的名稱和尾碼的Regex var name = $(this).val().replace(reg, ''); var postfix = /\.[^\.]+/.exec(name);//擷取檔案的尾碼 var