I am working with an Object array containing product information:
let products = [{ code: 'a', num: 1 }, { code: 'b', num: 2 }];
My goal is to extract the codes from this array: ['a', 'b'].
Currently, I'm achieving this using lodash:
let codes = [];
_.forEach(products, (product) => {
codes.push(product.code);
});
However, I'm wondering if there's a more efficient way to accomplish this task. Any suggestions?
Sure thing, a completely JavaScript-based approach is available:
const productCodes = products.map(item => item.code);
If you need to extract specific data from an array of objects, consider using the map() method in lodash:
let codes = _.map(productsArray, 'code');
let productsArray = [{ code: 'x', num: 10 }, { code: 'y', num: 20 }];
let extraction = _.map(productsArray, 'code');
document.write('<pre>' + JSON.stringify(extraction, 0, 4) + '</pre>');<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.12.0/lodash.js"></script>Implement vanilla JavaScript's Array.map method to transform an array
var arr = [{ code: 'a', num: 1 }, { code: 'b', num: 2 }];
var newArr = arr.map(function(obj){
return obj.code;
})
console.log(newArr)
var arr = [{
code: 'a',
num: 1
}, {
code: 'b',
num: 2
}];
var newArr = arr.map(function(obj) {
return obj.code;
})
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