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tekaratzas/scopesAndReferences.js

Last active July 21, 2017 18:46
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Exploring Scopes And namespaces in JavaScript
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scopesAndReferences.js
var foo = 12;
function changeFoo() {
foo = 34; // changes global scope and not local scope!
}
changeFoo();
console.log(foo);
// This becomes a more apparent issue in next example
// Out here is the global scope
for(var i = 0; i < 10; i++) {
innerLoop();
}
function innerLoop() {
// this is a different scope
for(i = 0; i < 10; i++) { // missing var statement! i refers to global scope!
console.log("this is will show 10 times and not 100.");
}
}
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