如何转换数组中的字符串？

Question

From http response I received an object like this:

{"[3, company1]":["role_user"], "[4, company2]":["role_admin"] }

The key is an array...Is there a way in typescript to convert the key

"[3, company1]" 

in an array like this

 [3, "company1"]

?

Answer 1

You can combine Object.keys with map and transform the string to array with split

 let data = {"[3, company1]":["role_user"], "[4, company2]":["role_admin"] } let keys = Object.keys(data) .map( el => el.replace('[', '') .replace(']', '') .split(',') .map(el => el.trim()) .map(el => isNaN(parseFloat(el)) ? el : parseFloat(el)) ) console.log("Keys: ", keys)

Here is the fiddle: https://jsfiddle.net/to38g6cb/1/

Answer 2

What do you want to convert the keys to?

if want to convert it to a normal array then the below should do.

 const httpResponse = { "[3, company1]": ["role_user"], "[4, company2]": ["role_admin"] }; const convertedKeys = Object.keys(httpResponse).map(value => { let keyArray = value.replace("[", "").replace("]", "").split(", "); return [parseInt(keyArray[0]), keyArray[1]]; }); console.log(convertedKeys);

If the above is not what you wanted, please kindly rephrase your question again.

Answer 3

You can remove the first and last character using slice(1,-1) and split the string at /\\s*,\\s*/ (comma with optional spaces on either side).

Then convert the first part to a number and return the array

 const input = { "[3, company1]": ["role_user"], "[4, company2]": ["role_admin"] } const output = Object.keys(input).map(k => { const [n, comp] = k.slice(1,-1).split(/\\s*,\\s*/) return [+n, comp] }) console.log(JSON.stringify(output))

Answer 4

It would have been easier if the company1 part were already quoted, so that you could just use JSON.parse . In fact, let's just do that! Put quotes around the company1 part with search and replace.

 let key = `[3, company1]`; let obj = JSON.parse(key.replace(/[$A-Z_]\\w*/gi, '"$&"')) console.log(obj);

Note: I'm guessing at what characters might be valid and went with something that looks vaguely like a JavaScript identifier. [$A-Z_]\\w* Obviously not commas and right square brackets, due to deserialization ambiguity.