如何将 object 中带逗号的单词转换为值

Question

I have:

WAIT_FOR_ANALYSIS,EMAIL_SENT

and I need transform it to:

[{ value: 'WAIT_FOR_ANALYSIS' }, { value: 'EMAIL_SENT' }]

I tried:

const wordToArray = filtered.split(',');
console.log(Object.assign({}, wordToArray));

But returns:

{0: "WAIT_FOR_ANALYSIS", 1: "EMAIL_SENT"}

Answer 1

What your code does is splitting your input string, using comma as a delimiter (which would result in ['WAIT_FOR_ANALYSIS', 'EMAIL_SENT'] ), after that you do Object.assign({}, wordToArray) which takes your array (which is essentially an object) and assigns key-value pairs (indexes and respective strings) to the empty object, giving you above result.

What you need to do instead is mapping your array (with Array.prototype.reduce() ) into array of the same size where each string value is mapped into an object {value: ..} .

With slight trick of destructuring it may look as follows:

 const str =`WAIT_FOR_ANALYSIS,EMAIL_SENT`, result = str.split(',').map(value => ({value})) console.log(result)

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Answer 2

As Yevgen mentioned, you can map each token (following the split operation) to an object. Instead of creating objects with key/value pairs, you can use the ECMAScript 2015 shorthand notation , as seen in his example.

When mapping to a object, if you simply pass-in the reference to another variable. A key will be created based on the name of the variable.

 const str = 'WAIT_FOR_ANALYSIS,EMAIL_SENT' const arr = str.split(',').map(value => ({ value })) // { value: value } console.log(arr)

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Here is an advanced solution, where an enum-like object is created.

 const str = 'WAIT_FOR_ANALYSIS,EMAIL_SENT' const main = () => { const statusType = createEnum(str.split(/\s*,\s*/g)) console.log(statusType) } const createEnum = (values) => values.reduce((res, name, ordinal) => ({...res, [name]: { name, ordinal } }), {}) main()

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