Array values to a string in loop

Question

I have an object (key value pair) looks like this

I want to get a string of '[100000025]/[100000013]'

I can't use var str = OBJ[0].PC + OBJ[1].PC (which gives me '100000025100000013') because I need the bracket structure. The number of items can vary.

Added >> Can it be done without using arrow function?

Jonas Wilms · Accepted Answer · 2019-08-13 11:05:39Z

6

 const string = array.map(({PC}) => `[${PC}]`).join('/')

You could map every string to the string wrapped in brackets, then join that by slashes.

edited Aug 13, 2019 at 11:05

Jonas Wilms

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answered Aug 13, 2019 at 11:00

Puwka

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1 Comment

The Tag Manager Over a year ago

Great! Thanks for the answer! Can it be done without using arrow function?

gavgrif · Accepted Answer · 2019-08-13 11:06:12Z

2

You can use a map() and a join() to get that structure. - this is hte same solution as Puwka's = but without the template literal.

var data = [
  {am: 1, ct: "", pc: "1000000025"},
  {am: 2, ct: "", pc: "1000000013"}
];

let newArr = data.map(item => "[" + item.pc +"]");

console.log(newArr.join("/")); // gives [1000000025]/[1000000013]

answered Aug 13, 2019 at 11:06

gavgrif

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Comments

panatoni · Accepted Answer · 2019-08-14 08:22:04Z

1

You can always use classic for in loop

let arr = [{PC:'1000'},{PC:'10000'}]
let arrOut = [];
for(let i = 0; i < arr.length; i++) {
    arrOut.push('[' + arr[i].PC + ']'); 
}

now the arrOut is equal ["[1000]", "[10000]"] what we need is to convert it to a string and add '/' between items.

let str = arrOut.join('/');
console.log(str) // "[1000]/[10000]"

answered Aug 14, 2019 at 8:22

panatoni

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2 Comments

The Tag Manager Over a year ago

Great! this is what I've been wanting for! Thanks!

Fallenreaper Over a year ago

OP, please update and select the right answer for future developers to help with. thank you;

Fallenreaper · Accepted Answer · 2019-08-13 15:07:37Z

So you need a string in the format of: xxxx/yyyyy from a complex object array.

const basedata = [...];
const result = basedata.map( item => `[${item.PC}]` ).join('/')

so i will explain it now. The map function will return a new array with 1 entry per item. I state that I want PC, but i added some flavor using ticks to inject it inbetween some brackets. At this point it looks like: ["[1000000025]","[100000013]"] and then join will join the arrays on a slash, so it will turn into an array.

"[100000025]/[100000013]"

Now, this will expand based on the items in your basedata. So if you have 3 items in your basedata array, it would return:

"[10000000025]/[100000013]/[10000888]"

Vivek Singh · Accepted Answer · 2019-08-13 11:06:15Z

0

First if you want to divide the result then it will be better to change it into number and then just do the division. Example

Number.parseInt("100000025")/Number.parseInt("100000013")

If you want to display it then better to use string interpolation surround it with back tick [${[0].PC}]/[${[1].PC}]

Hope this is what are you looking for

edited Aug 13, 2019 at 11:06

answered Aug 13, 2019 at 11:03

Vivek Singh

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1 Comment

VLAZ Over a year ago

I think OP wants the result to be the string [100000025]/[100000013] not, the mathematical operation100000025 / 100000013 of dividing two numbers.

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