如何使用 javascript 将字符串字段数组转换回数组

Question

Im receiving from an API something like this

"['item1', 'item2', 'item3']"

so even though it looks like an array is actually a string. I want to convert that to an array again so I did this.

 let pseudoArray = "['item1', 'item2', 'item3']";
 let actualArray = pseudoArray.slice(1, -1).split(', ');

And it kinda works I just remove the brackets at the beginning and the end with slice() and use split to separate by the comma into an actual array.

But I feel this is not the best way to do it, is there a better, cleaner way to parse this string into an array?

Answer 1

I think the better approach would be replace all single quote with double quotes.

var items = "['item1', 'item2', 'item3']";
items = items.replace(/'/g, '"') //replacing all ' with "
console.log(JSON.parse(items))

Hope it helps!

Answer 2

Just invert the characters ' and " to get the correct JSON string:

 const str = "['item1', 'item2', 'item3']"; const mapping = {"'": '"', '"': "'"}; const jsonStr = str.replaceAll(/[\'\"]/g, (e) => mapping[e]); const arr = JSON.parse(jsonStr); console.log(arr);

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Answer 3

You could try matching the string patterns directly, like this:

 var items = "['item1', 'item2', 'item3']"; const array = items.match(/(?<=')[^,].*?(?=')/g); console.log(array)

Answer 4

Best way is to first convert this normal string into a JSON string by replacing single quotes ( ' ) with double quotes ( " ) and then convert that JSON string into JSON object by using JSON.parse() method.

Live Demo :

 let str = "['item1', 'item2', 'item3']"; str = str.replace(/'/g, '"'); console.log(JSON.parse(str));