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JavaScript統計字串中每個字元出現次數完整執行個體，javascript字串
本文執行個體講述了JavaScript統計字串中每個字元出現次數的方法。分享給大家供大家參考，具體如下：
這是一個面試題，要求隨便給你一個字串，讓你求出字串中每個字元出現的次數。
先來看看運行效果：
具體代碼如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head> <title>求字串中每個字元出現的次數 </title> <script type="text/javascript"> var str = "abdcadfasfdbadfafdasdfasyweroweurowqrewqrwqrebwqrewqrejwq;;"; var array = str.split(""); array.sort(); var countArray = []; var CountObj = function(character){ this.count = 1 this.character = character; return this; } var arrayObj = null, countArrayObj = null, arrayLength = 0; for (var i = 0, length = array.length; i < length; i++) { arrayObj = array[i]; arrayLength = countArray.length; if (arrayLength > 0) { countArrayObj = countArray[arrayLength - 1]; if (countArrayObj.character == arrayObj) { countArrayObj.count = countArrayObj.count + 1; } else { countArray.push(new CountObj(arrayObj)); } } else { countArray.push(new CountObj(arrayObj)); } } /** * 輸出每個字母和其對應出現的統計資料 */ for(var i=0,length=countArray.length; i<length; i++) { countArrayObj = countArray[i]; console.log(countArrayObj.character + ":" + countArrayObj.count); } </script></head><body></body></html>
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