Question

我有一个这样的字符串：

var a = "expect ${} to any text ${}"
a = "expect ${} to include text ${}"
a = "expect ${} to deepEqual text ${}"

我想获取字符串中to旁边的值。例如，那应该给我：

any
include
deepEqual

我应该如何在javascript中执行此操作？

Answer 1

我没有正则表达式专家，但这很有效，正则表达式为/ to (\w+)/：

var a = "expect ${} to any text ${}";
console.log(a.match(/ to (\w+)/)[1]); // any

a = "expect ${} to include text ${}";
console.log(a.match(/ to (\w+)/)[1]); // include

a = "expect ${} to deepEqual text ${}";
console.log(a.match(/ to (\w+)/)[1]); //deepEqual

Answer 2

试试这个： .*(?:\bto\b)\s+(\w+).*

var re = /.*(?:\bto\b)\s+(\w+).*/gm;
var str = 'var a = "expect ${} to any text ${}"\na = "expect ${} to include text ${}"\na = "expect ${} to deepEqual text ${}"';
var subst = '$1';

var result = str.replace(re, subst);

<强> Live demo

Answer 3

您不需要正则表达式。只拆分两次

var str = "expect ${} to any text ${}";
console.log(str.split("to")[1].split(" ")[1]);

我们首先拆分to所以它会导致

["expect ${} ", " any text ${}"]

然后我们将第二个元素和" "分开，这将导致

["", "any", "text", "${}"] // take second element from here

如果你真的想要正则表达式，那么第一组将包含文本/to\s*(\S+)/。

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3 个答案: