Question 337998 in Javascript Question posted in
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Javascript – How to convert each value of an array object into single string?

Array Given:

const Collection = [{ id: 1 }, { id: 3 }, { id: 2 }, { id: 4 }]

Required String should be:

string = "1,3,2,4"

I have tried to get from forEach() loop to join() each value and save it in a string variable.

expecting result should be a comma separated string.

Tags:

2

Answers


  1. 0

    The forEach() method doesn’t return anything. Instead you want to map() each element to its id property, and then join() it:

    const collection = [{ id: 1 }, { id: 3 }, { id: 2 }, { id: 4 }];
console.log(collection.map(x => x.id).join()); // "1,3,2,4"

    Note that the join() method takes care of converting the numbers to strings and adding commas (","), which are the default separators.

    Playground link to code

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  2. 0

    You can use forEach, but you would have to pair it with something else.

    const Collection = [{ id: 1 }, { id: 3 }, { id: 2 }, { id: 4 }];
var res = [];

Collection.forEach(function(item) {
    res.push(item.id);
});

res = res.join(",");
console.log(res);
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