Javascript - mapping array of objects undefined

Question

I am passing an object from a function that contains an array arrCombined. I have an object titled results that I would like to map and remove the strings to so I can convert these strings into an integer. When mapping my array of objects for resultsI am stuck on getting undefined.

Here is my array:

[..]
    0: Object { result: "494,927", risk: "LOW", sector: "Online" }
    
    1: Object { result: "48,883", risk: "MEDIUM-LOW", sector: "Retail Stores" }
    
    2: Object { result: "59,976", risk: "MEDIUM-LOW", sector: "Store Pick up" }
    
    3: Object { result: "1,205,915", risk: "MEDIUM", sector: "Drive in" }
    
    4: Object { result: "1,434,262", risk: "LOW", sector: "In store" }

I am declaring a variable finalResult to return the targeted "result" in my mapping function which looks like this.

 let finalResult = arrCombined.arrCombined.result.map(function (e) {
        return Number(e.replace(/(,\s*)+/g, '').trim());
    });

console.log(finalResult) // undefined.

I am expecting a finalResult to return the result objects as numbers, i.e. 494927, 48883, 59976, 1205915, 1434262

Change it to arrCombined.map(function(e) and e.result.replace — adiga
– adiga, Commented May 27, 2020 at 14:50
But, that code should throw: Uncaught TypeError: e.replace is not a function — Ele
– Ele, Commented May 27, 2020 at 14:56

Nina Scholz · Accepted Answer · 2020-05-27 14:50:54Z

2

You need to take result property from each object.

var arrCombined = [
        { result: "494,927", risk: "LOW", sector: "Online" },
        { result: "48,883", risk: "MEDIUM-LOW", sector: "Retail Stores" },
        { result: "59,976", risk: "MEDIUM-LOW", sector: "Store Pick up" },
        { result: "1,205,915", risk: "MEDIUM", sector: "Drive in" },
        { result: "1,434,262", risk: "LOW", sector: "In store" }
    ],
    finalResult = arrCombined.map(({ result }) => Number(result.replace(/(,\s*)+/g, '').trim()));

console.log(finalResult);

answered May 27, 2020 at 14:50

Nina Scholz

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Comments

palaѕн · Accepted Answer · 2020-05-27 14:51:15Z

This happens because you are trying to access result property from arrCombined which is undefined and thus your code is not working. You simply need to map through arrCombined and then access result property of each object inside array like:

const arrCombined = [
  { result: "494,927", risk: "LOW", sector: "Online" },
  { result: "48,883", risk: "MEDIUM-LOW", sector: "Retail Stores" },
  { result: "59,976", risk: "MEDIUM-LOW", sector: "Store Pick up" },
  { result: "1,205,915", risk: "MEDIUM", sector: "Drive in" },
  { result: "1,434,262", risk: "LOW", sector: "In store" }
]

let finalResult = arrCombined.map(function (e) {
    return Number(e.result.replace(/(,\s*)+/g, '').trim());
});

console.log(finalResult)

TopWebGhost · Accepted Answer · 2020-05-27 14:51:41Z

0

It should be like this.

let finalResult = arrCombined.arrCombined.map(function (e) {
        return Number(e.result.replace(/(,\s*)+/g, '').trim());
    });

answered May 27, 2020 at 14:51

TopWebGhost

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Comments

Munesh Kumar · Accepted Answer · 2020-05-27 15:08:49Z

0

It should solve your issue

var arrCombined = [
{ result: "494,927", risk: "LOW", sector: "Online" },
{ result: "48,883", risk: "MEDIUM-LOW", sector: "Retail Stores" },
{ result: "59,976", risk: "MEDIUM-LOW", sector: "Store Pick up" },
{ result: "1,205,915", risk: "MEDIUM", sector: "Drive in" },
{ result: "1,434,262", risk: "LOW", sector: "In store" }
]

var finalResult = arrCombined.map(item => {
  return Number(item.result.replace(/(,\s*)+/g, '').trim())
});

console.log(finalResult)

answered May 27, 2020 at 15:08

Munesh Kumar

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