.jshintrc

merge: add mergeresult.mapaction to improve speed

As a part of [hg update] we convert all [ACTION_CREATED] merge
results into [ACTION_GET] actions, and that's slightly inefficient
because every insertion pays the full cost of maintaining the
[mergeresult] data structure up to date.

This commit adds a function [mapaction], which is faster.
(saves around 0.3s on a large update involving ~400k files)

{
    // Enforcing
    "eqeqeq"        : true,     // true: Require triple equals (===) for comparison
    "forin"         : true,     // true: Require filtering for..in loops with obj.hasOwnProperty()
    "freeze"        : true,     // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
    "nonbsp"        : true,     // true: Prohibit "non-breaking whitespace" characters.
    "undef"         : true,     // true: Require all non-global variables to be declared (prevents global leaks)

    // Environments
    "browser"       : true      // Web Browser (window, document, etc)
}