可以匹配并返回一部分文本的正则表达式，同时删除 rest 以使性别特定文本成为可能

Question

Don't know what to try. I keep getting these closed, because I'm told it is not explained, not specific, whatever. Perhaps rather than shutting this down instantly, someone on this site can be kind enough to help me? Is that possible without shutting down the thread instantly and before anyone can even ask a question?

In Javascript (Google App Scripts).

String="I want [him/her] to go to [his/her] side when [he/she] is done."

What is the regex that I'm trying to figure out would allow the result to be: "I want him to go to his side when he is done."

The common factor will be [.../...]

Since the second half of this question appears too be confusing and I keep getting the question closed before anyone has a chance to comment....I'll ask almost the same exact question again in a second post. You might guess what my follow up question will be, but apparently that is not appropriate to ask...I'll give extra brownie points if you know what I'm going to ask and can answer it.

Answer 1

The pattern, as represented in a RegExp is:

Starting [ = \[     (escaped since `[` has special meaning)
Option A   = [^\/]* (any character except slash, repeated 0-to-many times)
Slash      = \/     (escaped as above to differentiate from a RegExp literal terminator)
Option B   = [^\]]* (any character except a `]`, repeated 0-to-many times)
Closing ]  = ]

So putting this all together, with () for capture groups and adding a g flag for a global search, we get this mouthful since the string pattern we're looking for is rife with characters that are special to RegExp:

const pronounPattern = /\[([^\/]*)\/([^\]]*)]/g;

Now when we do a match/replace, because we have capture groups we get a pseudo-array, with index 0 being the full match, 1 being option A, and 2 being option B. This lets us now do a string replace. For example, if we always want to use option A, you can do:

const replaced = yourString.replace(pronounPattern, '$1');

The $1 means "use capture group 1" which is in our case the first in the either/or group. Use $2 for the second option. Putting this together in a function:

const MALE = 1;
const FEMALE = 2;
const pronounPattern = /\[([^\/]*)\/([^\]]*)]/g;
function replacePronounPlaceholders(str, option) {
  return str.replace(pronounPattern, '$' + option);
}

// Used like:

const replaced = replacePronounPlaceholders(
  "I want [him/her] to go to [his/her] side when [he/she] is done.",
  FEMALE);

Answer 2

var myStr = 'I want [him/her] to go to [his/her] side when [he/she] is done.';
var newStr = myStr.replace(/\[him\/her\]/g, "him").replace(/\[his\/her\]/g, "his").replace(/\[he\/she\]/g,"he");

Hope it helps.

Answer 3

not javascript but a regex solution with sed

$ echo "I want [him/her] to go to [his/her] side when [he/she] is done." | 
  sed -E 's_\[([^/]+)/[^]]+\]_\1_g'

I want him to go to his side when he is done.

you need to escape square brackets in literal use since it's a special regex char.

easy to change to get the second alternative

 ...  | sed -E 's_\[([^/]+)/([^]]+)\]_\2_g'

I want her to go to her side when she is done.