A few issues (Undefined output) and a few questions

[Boy_Wonder]

In the settings in the plugin its set however to be Random not Static

[Pebble]

Perhaps a screen shot of the user tabs from the build section would help diagnose it.

[Boy_Wonder]

Nevermind, I'm not sure when it happened but somehow the one for Random got changed to static. I'll see that first see if that fixes it (I'm honestly not even sure how!)

[Chris]

Jun 27, 2014 4:14:04 GMT -8 Peter said:

Yeah, probably something simple you have overlooked, because I ran this in the console, and it's fine...


var otmplace = pb.plugin.get('placeable_otm');

if(otmplace.settings.random_or_static === "random"){
var ran = (Math.random() * otmplace.settings.otms.length) | 0;

console.log("Random: " + ran);
} else {
console.log("static");
}

₊1

Nice example Peter
Bitwise OR appears to be one of the fastest truncation methods with bit shifting sometimes beating or tying it on the more popular platforms. [source]

I recall reading a few articles about it years ago and have seen the method used much more frequently in recent years (e.g. jquery source) but never saw stats to back up the rise in popularity until now.

[Peter]

Chris,

Am pleased you spotted it, I didn't think anyone would notice (I don't think many here do much with the bitwise operators probably). I haven't used it much in plugins, usually for mess around projects, otherwise people find it hard to read the code when it's heavy of bitwise (I know I do sometimes).

I actually noticed that negation and shifting is quicker in this test (sometimes shifting is quickest)...

jsperf.com/math-floor-vs-math-round-vs-parseint/118


console.log(~~ Math.PI) // 3

console.log(Math.PI >> 0) // 3
Firefox / Chrome




Consistently, it seems a double NOT is the better option, as it's faster that ORing.  Either way, bitwise it a lot faster from the tests.

[Wormopolis]

Unless Im running it in a giant loop, I stick with parseInt because I just like typing it. if you run it once, we are talking millionths/billionths of a second difference.

[Chris]

True Wormo , and as Peter pointed out, readability is important too and the billionth of a second one saves means one could potentially lose a couple hours hunting down a bug because the intent of the line was not clear. It brings to mind an adage my grandmother is frequently found saying: "penny wise and dollar foolish".