Javascript jQuery：在字符串中查找数组元素 [英] Javascript jQuery: find array elements within a string

问题描述

我认为我的问题相当简单，但我对Javascript不是很有经验。我想要做的是拉取页面的源代码并将其全部添加到变量中：

I think my question is fairly straightforward but I'm not very experienced with Javascript. What I am trying to do is pull the source code of a page and stick it all into a variable:

var sourcecode = document.documentElement.innerHTML;

然后我有一系列我想搜索该变量的术语：

Then I have an array of terms that I want to search that variable for:

var array = ['Huskers','Redskins','Texans','Rockets'];

我想将0分配给<中找不到的任何数组元素code> sourcecode 变量和1到任何。因此，当搜索完成时，每个数组元素将由一个等于1或0的变量表示。任何人都可以给我一个关于我应该怎么做的提示？

I would like to assign a 0 to any of the array elements that aren't found in the sourcecode variable and a 1 to any that are. So, when the search is complete each array element will be represented by a variable that will either equal 1 or 0. Can anyone please give me a hint as to how I should go about this?

谢谢！

推荐答案

有点神秘但做你需要的事情：

A bit cryptic but does what you need:

var source = 'lorem hello foo bar world';
var words = ['hello','red','world','green'];

words = words.map(function(w){ return +!!~source.indexOf(w) });

console.log(words); //=> [1, 0, 1, 0]

+ !!〜转换 indexOf 返回的值的多个布尔表示形式，与：

+!!~ casts a number of the boolean representation of the value returned by indexOf, same as:

return source.indexOf(w) == -1 ? 0 : 1;

但有点短。

注意 indexOf 匹配字符串中的字符串，如果要匹配整个单词，可以使用带有字边界的正则表达式 \b ：

Note that indexOf matches strings within strings as well, if you want to match whole words you can use regex with word boundaries \b:

words = words.map(function(w) {
  return +new RegExp('\\b'+ w +'\\b','gi').test(source);
});

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