Earlier quoted context omitted.
When it comes to primitives you can only pass by value, but with objects and arrays you can only pass by reference . And this applies to comparisons too: when comparing objects or arrays you are comparing by reference , not deeply by their inner values. If you want to compare them deeply you have to take some additional steps to make that possible, and all of the different strategies for doing so have different trade…
You don't pass by reference in JS. You pass references by value. Passing by reference has a well defined meaning in computer language terminology. It means passing something that references the variable outside the function. Something you can't do in JavaScript void someFunc(ref int v) { v = 456; } var foo = 123; someFunc(foo); write(foo); // output 456 Above we are not passing 123 (the value of foo) into someFumc, w…
function someFunc(v) {
v.myvar = 456;
v = someOtherObject;
}
var foo = someObject;
foo.myvar = 123;
someFunc(foo);
// foo still refers to someObject
// foo.myvar is 456