CODEWITHSUNDEEP
javascript
eozzy
eozzy

Reputation: 68720

Omit object items

So this works:

var object = { 'a': 1, 'b': '2', 'c': 3 };

// Underscore/Lodash
var result = _.omit(object, ['a', 'c']);
console.log(result)
// output: { 'b': '2' }

// Native
var { a, c, ...result2 } = object;
console.log(result2)
// output: { 'b': '2' }

... but it doesn't work if my key has dashes:

var object = { 'my-key': 1, 'b': '2', 'my-secret': 3 };
    
    // Underscore/Lodash
    var result = _.omit(object, ['a', 'c']);
    console.log(result)
    // output: { 'b': '2' }
    
    // Native
    var { 'my-key', 'my-secret', ...result2 } = object;
    console.log(result2)
    // Error: SyntaxError: missing : after property id",
    // expected output: { 'b': '2' }

Upvotes: 3

Views: 51

Answers (1)

Mark
Mark

Reputation: 92461

When you use destructing like this you are assigning values to names even if you aren't using them. my-key isn't a valid variable name, so can't restructure into that name. You can, however, rename the keys in the destructuring and avoid the problem:

var object = { 'my-key': 1,'b': '2','my-secret': 3};

var {'my-key': k, 'my-secret': k2, ...result2} = object;

console.log(result2)

Upvotes: 5

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