Print every N-th Element from an Array JS [duplicate]

Question

Print every N-th Element from an Array Write a JS function that collects every element of an array, on a given step. The input comes as array of strings. The last element is N - the step. The collections are every element on the N-th step starting from the first one. If the step is "3", you need to print the 1-st, the 4-th, the 7-th … and so on, until you reach the end of the array. Then, print elements in a row, separated by single space.

Example: Input Output ['5', '20', '31', '4', '20', '2'] 5 31 20

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– adiga, Commented Feb 12, 2019 at 13:18
Possible duplicate of Javascript: take every nth Element of Array and How to take every 3rd element of an array — adiga
– adiga, Commented Feb 12, 2019 at 13:19

Mr.Deer · Accepted Answer · 2019-02-12 13:34:34Z

0

If you want to get the N-th positions and the only print it in the same array separated with spaces you can do it with this function

function splitByStep(step, arr)
{
    var steppedString = "";

    for(i = 0 ; i < arr.Lenght; i += step)
        steppedString += arr[i] + " ";

    console.log(steppedString);
}

step would be the '3' in your question and arr the array.

You need to use a for to go around array items, arrays are like boxes. To reach the positions they ask, you need to read only the N-th positions. The step is the space between positions. You only need to sum to first position (0) the step while the array is not toally chececk.

edited Feb 12, 2019 at 13:34

answered Feb 12, 2019 at 13:26

Mr.Deer

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