正则表达式在字符串中搜索两个字符串之间的内容

Question

I am trying my upmost best to get my head around regex, however not having too much luck.

I am trying to search within a string for text, I know how the string starts, and i know how the string ends, I want to return ALL the text inbetween the string including the start and end.

Start search = [{"lx":

End search = }]

ie

[{"lx": variablehere }]

So far I have tried

/^\[\{"lx":(*?)\}\]/;

and

/(\[\{"lx":)(*)(\}\])/;

But to no real avail... can anyone assist?

Many thanks

Answer 1

The * star character multiplies the preceding character. In your case there's no such character. You should either put . , which means "any character", or something more specific like \\S , which means "any non whitespace character".

Answer 2

You're probably making the mistake of believing the * is a wildcard. Use the period ( . ) instead and you'll be fine.

Also, are you sure you want to stipulate zero or more? If there must be a value, use + (one or more).

Javascript:

'[{"lx":variablehere}]'.match(/^\[\{"lx":(.+?)\}\]/);

Answer 3

Possible solution:

var s = '[{"lx":variablehere}]';
var r = /\[\{"(.*?)":(.*?)\}\]/;
var m = s.match(r);

console.log(m);

Results to this array:

[ '[{"lx":variablehere}]',
  'lx',
  'variablehere',
  index: 0,
  input: '[{"lx":variablehere}]' ]

Answer 4

\[\{"lx"\:(.*)\}\]

This should work for you. You can reach the captured variable by \\1 notation.

Answer 5

Try this:

    ^\[\{\"lx\"\:(.*)\}\]$

all text between [{"lx": and }] you will find in backreference variable (something like \\$1 , depends on programming language).