计算字符串Javascript中单词的出现次数 [英] Counting occurrences of a word in a string Javascript

问题描述

有没有人知道一种简单的方法来计数Javascript字符串中某个单词的出现，而没有一个可用的预定义单词列表？理想情况下，我希望它输出到一个关联数组（Word，Count）。

Does anyone know a simple way of counting the occurrences of a word in a Javascript String, without a predefined list of words that will be available? Ideally I would like it to output into an associative array (Word, Count).

例如，输入 Hello，你好吗的输入将输出以下内容：-
Hello：2
如何：1
是：1
您：1

For example an input along the lines of "Hello how are you Hello" would output something along the lines of:- "Hello": 2 "how": 1 "are": 1 "you": 1

我们非常感谢您的帮助。

Any help is greatly appreciated.

谢谢

推荐答案

var counts = myString.replace/[^\w\s]/g, "").split(/\s+/).reduce(function(map, word){
    map[word] = (map[word]||0)+1;
    return map;
}, Object.create(null));

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