JavaScript generate array of strings with inline solution - Stack Overflow

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There simple code:

var arr = [];
for(var i = 0; i < 10; i++){
    arr.push("some string with iterating value "+i);
}

I wonder if there is a one-line solution in which I enter the string and the maximum value and get an array of generated lines.

There simple code:

var arr = [];
for(var i = 0; i < 10; i++){
    arr.push("some string with iterating value "+i);
}

I wonder if there is a one-line solution in which I enter the string and the maximum value and get an array of generated lines.

• javascript
• arrays
• string

Share Improve this question Follow asked Oct 14, 2017 at 9:44 el paxel pax 12711 gold badge22 silver badges88 bronze badges 2

• You want an array of strings in a one liner? – putvande Commented Oct 14, 2017 at 9:46
• Let's say I have string: "some string %d" (%d is example). And maximum value: 2. I want to get array: ["some string 1", "some string 2"] – el pax Commented Oct 14, 2017 at 9:49

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3 Answers 3

Sorted by: Reset to default 12

Try this, if the input is 5, you can have it as N and get the input from user

DEMO

var result = Array.from(new Array(5),(val,index)=> "some string " + index );
console.log(result);

const newArray = [...Array(10)].map((_, i) => `some string with iterating value ${i}`)
console.log(newArray)

You can use a spread operator and create a new array of the length you require, loop (map) over it and return the string. This will create a new array of the length (10) with the string you want in it.

How about making it a reusable function? E.g.

// Replaces '{i}' with the index number
var generateStringArray = (length, string) => Array.from(new Array(length), (val, index) => string.replace('{i}', index))

console.log(generateStringArray(6, "some string {i}"));

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