javascript - 正则表达式 - 匹配字符而不是数字

Question

我想匹配一个字符串后跟多个选项卡和另一个字符串。第二个字符串不能包含任何数字。

所以我想要 'someText\t\tsomeText2' -> someText & somteText2

我有以下 JavaScript:

var linePattern = /(^[^\s].+?)\t+([^\d].+)/
var regexp = new RegExp(linePattern);
var parts = 'someText\t\t1234'.match(regexp);

不确定为什么它实际上匹配...它不应该...

Answer 1

因为最后的 .+ 也会匹配数字。

^(.*?)\t\t+(\D+)$

或者

^(.*?)\t+(\D+)$

DEMO

你的正则表达式，

    (^             [^\s]               .+?)               \t+                          ([^\d].+)
                     ^                  ^                 ^
   Start           Matches the   Matches all the chars  Matches only the first tab  since the second character must not be a non-digit character. So `[^\d]` matches the second tab. and the `.+` matches all the chars upto the last. Finally you got a match.
            first non-space      upto the  first tab
              character.

代码:

> var linePattern = /^(.*?)\t+(\D+)$/;
undefined
> var regexp = new RegExp(linePattern);
undefined
> var parts = 'someText\t\t1234'.match(regexp);
undefined
> parts
null
> var parts = 'someText\t\tfoo'.match(regexp);
undefined
> parts
[ 'someText\t\tfoo',
  'someText',
  'foo',
  index: 0,
  input: 'someText\t\tfoo' ]