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js pass by value and by reference

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barisx answered on May 20, 2020 Popularity 10/10 Helpfulness 1/10

answer js pass by value and by reference

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js pass by value and by reference

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-1

function f(a,b,c) {
    // Argument a is re-assigned to a new value.
    // The object or primitive referenced by the original a is unchanged.
    a = 3;
    // Calling b.push changes its properties - it adds
    // a new property b[b.length] with the value "foo".
    // So the object referenced by b has been changed.
    b.push("foo");
    // The "first" property of argument c has been changed.
    // So the object referenced by c has been changed (unless c is a primitive)
    c.first = false;
}

var x = 4;
var y = ["eeny", "miny", "mo"];
var z = {first: true};
f(x,y,z);
console.log(x, y, z.first); // 4, ["eeny", "miny", "mo", "foo"], false

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: stackoverflow.com

Tags: javascript pass-by-value reference

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Contributed on Jul 30 2022

barisx

0 Answers Avg Quality 2/10

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function add(a, b, output) {
  output.out = a + b;
}

var output = {};
add(5, 3, output);
console.log(output); //output: {out: 8}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on May 20 2020

TC5550

0 Answers Avg Quality 2/10

js pass by value and by reference

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