I recently encountered this syntax in a tutorial and I'm unsure if it's ES6. It was part of a reduce function. Can someone provide a clear explanation of what is happening inside these parentheses?
{...curr, ...acc}
Here is the full code snippet:
const endShape = _(raw)
.filter(({key}) => !/garbage/.test(key))
.map(({key,value})=>({[key]:value}))
.reduce((acc,curr)=>({...curr, ...acc}));
console.log(endShape);
The benefits of using the Spread Operator Shorthand With the introduction of ES6, JavaScript developers have access to the spread operator, a tool that offers efficiency and enjoyment in coding. One major advantage is its ability to replace certain array functions, simplifying code and making it more concise. The spread operator, represented by three dots, has various use cases that can enhance the overall programming experience.
Comparing Longhand and Shorthand Methods
// Longhand approach
const odd = [1, 3, 5];
const nums = [2 ,4 , 6].concat(odd);
// Cloning arrays
const arr = [1, 2, 3, 4];
const arr2 = arr.slice();
Shorthand technique
// Joining arrays efficiently
const odd = [1, 3, 5 ];
const nums = [2 ,4 , 6, ...odd];
console.log(nums); // [ 2, 4, 6, 1, 3, 5 ]
// Cloning arrays with ease
const arr = [1, 2, 3, 4];
const arr2 = [...arr];
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