I have an array var plans=[a, b, c, d ]; with prices based monthly any yearly.
Consider- a and b are monthly and c and d are yearly.
So, I want to split the array based on the monthly and yearly values and store the values in to separate arrays
var monthly_plans=[]; and var yearly_plans=[]
So, how do I do this?
I have used the js split() function before but on a very basic level.
split() is a method of the String object, not of the Array object.
From what I understand from your question, you need the Array.prototype.slice() method instead:
The slice() method returns a shallow copy of a portion of an array into a new array object.
Syntax
arr.slice([begin[, end]])
In conclusion, you may want to do something like this:
var monthly_plans = plans.slice(0, 2);
var yearly_plans = plans.slice(2);
You can use the slice(start, end) function on arrays, e.g.
monthly_plans = plans.slice(0,2);
yearly_plans = plans.slice(2,4);
More info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
And the ES5 approach:
var plans=[a, b, c, d];
var monthly_plans = plans.filter( plan => plan==='monthly condition' );
var yearly_plans = plans.filter( plan => plan==='yearly condition' );
I think it will be a better avenue to use a for.
Example:
for (var i=0;i<plans.length;i++)
{
if(plans[i] == 'monthly condition')
{
monthly_plans.push(plans[i]);
}
else
{
yearly_plans.push(plans[i]);
}
}
i <= plans.length should be i < plans.lengthBased on your post, the solution will not involve split(). If you know in advance which plan designations are monthly and which are yearly:
var plans = ['a', 'b', 'c', 'd', 'm', 'y', ....... 'n'],
count = plans.length, i = 0;
var monthly_designations = ['a', 'b', 'm'],
yearly_designations = ['c', 'd', 'y'];
for(; i < count; i++) {
if (monthly_designations.indexOf(plans[i]) !== -1) {
monthly_plans.push(plans[i]);
} else {
if (yearly_designations.indexOf(plans[i]) !== -1) {
yearly_plans.push(plans[i]);
}
}
}
Then just check the plans array against the known designations to filter the contents into the correct sub-arrays monthly_plans and yearly_plans.
Maybe
function split2DAryOnIdx_n() {
const
array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]],
[leftArray, rightArray] = split2DAryOnIdx(array, 1);
console.log(leftArray); // [[1], [4], [7]]
console.log(rightArray); // [[2, 3], [5, 6], [8, 9]]
}
const
split2DAryOnIdx = (array, Idx) => {
let
leftArray = [],
rightArray = [];
for (let row of array) {
let
leftElement = row.slice(0, Idx),
rightElement = row.slice(Idx);
leftArray.push(leftElement);
rightArray.push(rightElement);
}
return [leftArray, rightArray];
}
