IdiomaticJS vs. IdiomaticJS @ Linkedin

gistfile1.txt

Hey all,

During our meeting, Seth asked me what all the differences were between the vanilla IdiomaticJS standard and the LinkedIn idiomatic JS standard. I didn't feel I gave a very sufficient answer, so I decided to run the diff myself and cull out the JS@LinkedIn agreed-upon changes (plus, frankly, it's something I should just know):

1. args in parentheses will not internally wrap spacing:
for ( i in bar ) { ...
becomes
for (i in bar) { ...

if ( foo === bar ) { ...
becomes
if (foo === bar) { ...

var fruits = [ 'apples', 'peaches', 'pears' ];
becomes
var fruits = ['apples', 'peaches', 'pears'];

2. Cleanup in some of the code examples (making styling easier to follow)

3. They used double-quotes fairly liberally; we removed them from the doc entirely (as per our style of not using double-quotes, enforced by JSHint):
"For consistency, single-quotes (') are preferred as opposed to double-quotes (").  This is helpful when creating strings that include HTML."

4. Name booleans in a positive way to avoid the confusing double negative.

hasNoWater evaluating to true
should be
hasWater evaluating to false

5. Hungarian Notation (prefixing) are common and encouraged in these situations:

Regular expressions:
rDesc = /abc/gi;

Private or protected:
var _privateValue;

Cached copy of a jQuery-wrapped object:
$mainContainer = $('#main');

6. White-spacing function declarations:
function foo(arr1, arr2) {...

var foo = function (arr1, arr2) {...

(function () {

}(inv)); // Note the invocated value is *inside* the parens, though both inside and outside are acceptable by ECMA, JSHint will throw an error when it is invoked outside.

7. Use semicolons where applicable (which is pretty much anywhere besides named or anonymous functions):

Declarations
var foo = 1;

var bar = function () {
  // ...
};

function bar() {
  // ...
}

Statements & Expressions
users.push('Bob');

7. Don't use comma-first:
// bad
var bar = 1
  , foo = 2
  , baz = 3;

// good
var bar = 1,
  foo = 2,
  baz = 3;