将 Javascript 字符串转换为文字数组

Question

In python there exists ast.literal_eval(x) where if x is "['a','b','c']" then it will return the list ['a','b','c'] . Does something similar exist in Javascript / jQuery where I can take the array that is stored in the table cell as [x,y,z] and turn that into a literal JavaScript array?

I'd prefer to avoid any complex solutions that might be error prone since it's possible that involve splitting on the comma or escaping characters.

Edit: I should have given some better examples:

['la maison', "l'animal"] is an example of one that hits an error because doing a replace of a single or double quote can cause an issue since there's no guarantee on which one it'll be.

Answer 1

One could leverage String.prototype.replace() and JSON.parse() .

See below for a rough example.

 // String.prototype.replace() + JSON.parse() Strategy. const input = "['a','b','c']" // Input. const array = JSON.parse(input.replace(/'/g, '"')) // Array. console.log(array) // Proof.

Although, given your update/more complex use case, eval() might be more appropriate.

 // eval() Strategy. const input = `['la maison', "l'animal"]` // Input. const dangerousarray = eval(input) // Array. const safearray = eval(`new Array(${input.replace(/^\\[|\\]$/g, '')})`) console.log(dangerousarray) // Proof. console.log(safearray) // Proof.

However, the MDN docs discourage use of eval() due to security/speed flaws.

As a result, one may opt for an approach similar to the following:

 // Heavy Replacement Strategy. const input = `['la maison', 'l\\'animal']` // Input. const array = input .replace(/^\\[|\\]$/g, '') // Remove leading and ending square brackets ([]). .split(',') // Split by comma. .map((phrase) => // Iterate over each phrase. phrase.trim() // Remove leading and ending whitespace. .replace(/"/g, '') // Remove all double quotes ("). .replace(/^\\'|\\'$/g, '') // Remove leading and ending single quotes ('). ) console.log(array) // Proof.

Answer 2

In JavaScript you can use eval() Function like the sample bellows :

 // define the string to evaluate var str_to_evaluate = 'new Array("Saab", "Volvo", "BMW")'; // retreive the result in a array var cars = eval(str_to_evaluate); // print the array console.log(cars);