I have the following array:
var arr = ["Toyota", "Hyundai", "Honda", "Mazda"];
I want to slice each element backwards, like:
var arr = ["Toyota", "Hyundai", "Honda", "Mazda"].slice(-2);
so it will return:
arr = ["Toyo", "Hyund", "Hon", "Maz"];
Is it possible? or is there anyway of doing this?
You can't use slice directly, as it has a different meaning with an array and will return you a list of array elements.
var arr = ["Toyota", "Hyundai", "Honda", "Mazda"]
arr.slice(0, -2) // returns the elements ["Toyota", "Hyundai"]
In order to do the slice on each element, you can use .map() (on IE9+):
var out = arr.map(function(v) { return v.slice(0, -2) })
// or using underscore.js for wider compatibility
var out = _.map(arr, function(v) { return v.slice(0, -2) })
// or using a more modern arrow function
var out = arr.map(v => v.slice(0, -2))
Alternatively, you could just use a loop:
var i, out = []
for (i = 0; i < arr.length; ++i) {
out.push(arr[i].slice(0, -2))
}
or, in more modern syntax:
const out = new Array(arr.length)
for (let i = 0; i < arr.length; ++i) {
out[i] = arr[i].slice(0, -2)
}
