If a Javascript object has a property which holds a reference to a function, can I get that property name from within the function itself? -

If a Javascript object has a property which holds a reference to a function, can I get that property name from within the function itself? -

so:

class="lang-js prettyprint-override">var obj = { 'key': function() { // 'key' here } }; obj.key();

example:

http://plnkr.co/edit/tsuz6wy1qivuoie3qsuv?p=preview

class="lang-js prettyprint-override">var logger = { 'warn': function(msg) { var loglvl = 'warn'; // <-- want string 'warn' right here console.log('[', loglvl, ']', msg); } }; logger.warn('computer exploding.'); // => [ warn ] computer exploding.

i can think of convoluted method of using named function , searching this value of function:

http://plnkr.co/edit/ihu087timhzca2ebjdua?p=preview

class="lang-js prettyprint-override">var logger = { 'warn': function func(msg) { console.log('[', _.invert(this)[func], ']', msg); } }; logger.warn('computer exploding.');

is there easy way this?

update: here's more detail on why i'm asking.

this angular application. here's list of presets. preset has name , 2 numbers: https://github.com/wideshanks/breatherbar/blob/rmui/app.js#l372

these rendered list items on front end end: https://github.com/wideshanks/breatherbar/blob/rmui/index.html#l42

when clicks on list item, want add together new default pattern list , set name/two numbers what's in preset.

the presets functions add together new patterns. 2 numbers defined within function body, name of preset outside function: it's property name in $scope.presets: https://github.com/wideshanks/breatherbar/blob/rmui/app.js#l359

probably need rethink whole thing, because way did has ended convoluted.

you rig this:

var loglevels = [ "trace", "debug", "info", "warn", "error" ]; var logger = loglevels.reduce(function(logger, level) { logger[level] = function(msg) { console.log("[" + level + "] " + msg); }; homecoming logger; }, {});

that iterates through list of (made-up of course) log levels, adding function each. function relies on closure created around .reduce() callback. each function behaves according logger property it's associated, it's not intrinsically bound way.

javascript