Javascript addition weird result [closed] - javascript

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In this simple animation, the result of the addition in line 56:
this.elapsedTime += dt;
of the JS script is something like -1378499284830.2598 for no particular reason.
In fact the numbers that I'm adding are two "normal" numbers.
UPDATE:
And this is the revision that worked.

The problem in your code is not in the addition, but on line 86:
var dt = timestamp - last_frame_update_time;
frame = coin_animation.update(dt);
There, in the first call you obtain the negative value you are trying to add later. I'd recommend debugging that using something like chrome dev tools.
EDIT: You are trying to do an operation between two values that have nothing to do between themselves.
timestamp is the parameter received from requestAnimationFrame (check the docs), and the other one is new Date().getTime(); which is not appropriate.
Try changing line 96 to:
last_frame_update_time = 0;

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javascript comma separators and session storage [closed]

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I'm new to javascript and so I don't fully understand passing objects... my final product is simple build a comma separated counter that doesn't reset when someone refreshes the page. Guymid build a jsbin demo http://jsbin.com/IyavAPoN/1/edit. It seems that the solution to my problem is pretty straightforward but I can't seem to put them together.
to not reset, someone suggested using sessionStorage which seem to work on another code but I can't seem to incorporate it to the codes that I have as reflected in the JSBin Link.
Any help is much appreciated.
The way to do it is simply do localStorage: http://jsbin.com/ogeYOZa/2/ i basically just store values in localStorage and that's the only difference. However, there are a few more: Instead of just using +=1 to increment values, I use parseInt because localStorage values are strings.

Regular expression to get value [closed]

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I was wondering how I would go about getting the value from this string:
LUGG::1::LUGG::5-GBP
In this case, the value retrieved would be "1".
It's hard to say for certain without knowing all the possible options of input strings, but for example if you always just want to get the number that has :: on its left AND :: on its right (1 in your example):
var myInput = 'LUGG::1::LUGG::5-GBP';
var myNumber = myInput.match(/::(\d+)::/)[1];
alert(myNumber); // alerts 1

Is it possible to call GCM expire time in javascript [closed]

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In my phonegap application i like to call this function, where i should this piece of code whether inside the receiver or inside third party plugin
https://stackoverflow.com/a/18072720/1482099
You have no reason to call this function.
You should be aware that GCMRegistrar is deprecated. In addition, the getRegisterOnServerLifespan wasn't very useful even when it wasn't deprecated.
BTW, that method has nothing to do with the question that the answer in your link was supposed to answer. It returns an arbitrary time period after which the registration ID is considered expired, while the question was about expiration of the API key.

Running JS scripts conditionally in an HTML file [closed]

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Closed 9 years ago.
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Because of browser related issues (ie, the view being different), I have two versions of a script. one that works on everything but IE, and one I wrote specifically to accomodate IE.I found this other script that detects what browser someone is using when they access a website. I was wondering, if there was anyway i could:
1.run this browser detect script FIRST to determine the boolean for IE/not IE
2. then, determining on this value, run one script or the other?
So... What's stopping you from doing:
var IE = checkBrowserFunction;
if(IE) {
doStuff();
}
? I mean, that seems fairly simple.

Phone number regex in javascript/jquery on (000)000-0000 [closed]

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I'm using jquery.validate.addMethod(), and need a regex for specific phone number format. I somehow knew it before, but since I don't use regex that much, I forgot.
So, this is just a simple question: How do you create a regex for javascript on the following format:
(000)000-0000
The current phoneUS format which jQuery Validate possess is not applicable to the current problem.
/^\(\d{3}\)\s?\d{3}-\d{4}$/
This allows for a space after the closing parenthesis as well.
Something like this:
/^\(\d{3}\)\d{3}-\d{4}$/

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