標籤：code https blank 標準模式 function body reduce ie9 map
代碼如下：
<!DOCTYPE html><html lang="zh-CN"><head> <meta charset="UTF-8"> <title>最多出現的字元和次數</title></head><body> <script> var str = ‘h$^&**0‘; function most(str) { return (str + ‘‘).split(‘‘).reduce(function(pre,cur,index,array){//reduce()是個迭代執行函數，ie9+標準模式支援，跟map()函數有點類似。 cur in pre ? pre[cur]++ : (pre[cur]=1); pre[cur] > pre.value && (pre.value=pre[cur],pre.char = cur); return pre; },{value:0,char:null}); } console.log(most(str)); </script></body></html>
reduce()函數的參數用法可以參考網址：https://msdn.microsoft.com/library/ff679975(v=vs.94).aspx
js實現尋找字串出現最多的字元和次數
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