I am taking data from my backend in this simple way
this.archiveService.getRooms(team).subscribe(
res => {
this.form = res;
this.form.forEach(el => {
el.reservation.slice(-6).match(/.{1,2}/g).join('/');
});
},
error => {
console.log(error);
}
)
this.form is a Object I am getting reservation number from form then I want to slice everything that I don't want. ( Regex works fine ).
Then I want to assign this prepared value into my this.form then I using *ngFor in table
How can I assign each value from forEach loop into this.form
As read in the documentation, the js slice method
Return A new array containing the extracted elements.
In fact, the slice methods does not modifiy the current element of the array
To solve your problem, you can either use the splice methods which works as the following :
The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place. To access part of an array without modifying it, see slice().
this.form.forEach(el => {
el.reservation.splice(-6).match(/.{1,2}/g).join('/');
});
Or re-assign the value using the slice method
this.form.forEach(el => {
el.reservation = el.reservation.slice(-6).match(/.{1,2}/g).join('/');
});
const myArr = [1,2,3,4,5,6,7,8,9,10]
const returnVal = myArr.slice(0,5)
console.log(`val return by slice : ${returnVal}`)
console.log(`current arr : ${myArr}`)
console.log('------------------')
const myArr2 = [1,2,3,4,5,6,7,8,9,10]
const returnVal2 = myArr2.splice(0,5)
console.log(`val return by splice : ${returnVal2}`)
console.log(`current arr : ${myArr2}`)Propose of .foreach() doesn't serve what you want.
However, If you feel the life is quite ordinary and want to do some advance. Check is out Array.prototype.forEach()