I stumbled upon this line of code in Angular. Can someone explain its meaning?
this.columns = [...this.columns, col];
My guess is that this relates to the immutable concept of arrays.
I stumbled upon this line of code in Angular. Can someone explain its meaning?
this.columns = [...this.columns, col];
My guess is that this relates to the immutable concept of arrays.
The process of destructuring in JavaScript allows for unpacking values from arrays or properties from objects, not restricted to Angular only. This functionality enables the assignment of distinct variables.
For this.columns to be valid, it must be either an object or an array. It extracts all values or properties from this.columns and assigns individual variables to each one. Based on your code, it seems likely that it is an array.
In summary, the code unpacks current values from this.columns, forms a new array containing these elements along with 'col', and then reassigns it back to this.columns.
To put it simply, the code inserts col into this.columns.
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