我需要找到一个单独的文字块匹配多个定期EX pressions的最有效的方式。为了给什么,我需要一个例子,考虑文本块:
I need to find the most efficient way of matching multiple regular expressions on a single block of text. To give an example of what I need, consider a block of text:
你好世界多么美好的一天
"Hello World what a beautiful day"
我想用再见和世界与宇宙替代你好。我可以使用类似与string.replace功能availiable各种语言总是这样做在一个循环ofcourse。
I want to replace Hello with "Bye" and "World" with Universe. I can always do this in a loop ofcourse, using something like String.replace functions availiable in various languages.
不过,我可以有文字多个字符串模式,我需要匹配,更换一块巨大。
However, I could have a huge block of text with multiple string patterns, that I need to match and replace.
我在想,如果我可以使用普通防爆pressions有效地做到这一点还是我必须使用像LALR解析器。
I was wondering if I can use Regular Expressions to do this efficiently or do I have to use a Parser like LALR.
我需要这样做的JavaScript,因此如果任何人知道,可以把它做的工具,这将是AP preciated。
I need to do this in JavaScript, so if anyone knows tools that can get it done, it would be appreciated.
推荐答案
您可以通过一个函数来代替:
You can pass a function to replace:
var hello = "Hello World what a beautiful day";
hello.replace(/Hello|World/g, function ($0, $1, $2) // $3, $4... $n for captures
{
if ($0 == "Hello")
return "Bye";
else if ($0 == "World")
return "Universe";
});
// Output: "Bye Universe what a beautiful day";
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