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Objective-C declared @property attributes (nonatomic, copy, strong, weak)
...so atomic variables are threadsafe (can be accessed from multiple threads without botching of data)
Copy
copy is required when the object is mutable. Use this if you need the value of the object as it is at this moment, and you don't want that value to reflect any changes made by other owners of the...
How to programmatically get iOS status bar height
I know that currently the status bar (with the time, battery, and network connection) at the top of the iPhone/iPad is 20 pixels for non-retina screens and 40 pixels for retina screens, but to future proof my app I would like to be able to determine this without hard coding values. Is it possible to...
How can I make setInterval also work when a tab is inactive in Chrome?
...ond. This works great, however when I select another tab (so that the tab with my code becomes inactive), the setInterval is set to an idle state for some reason.
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How can I detect if a selector returns null?
...
My favourite is to extend jQuery with this tiny convenience:
$.fn.exists = function () {
return this.length !== 0;
}
Used like:
$("#notAnElement").exists();
More explicit than using length.
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In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
...
The reason is because when you explicitly do "0" == false, both sides are being converted to numbers, and then the comparison is performed.
When you do: if ("0") console.log("ha"), the string value is being tested. Any non-empty string is true, while an empty s...
Making a private method public to unit test it…good idea?
...
Note:
This answer was originally posted for the question Is unit testing alone ever a good reason to expose private instance variables via getters? which was merged into this one, so it may be a tad specific to the usecase presented there.
As a general statement, I'm usually all for ...
PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...g of using TIMESTAMP to store the date+time, but I read that there is a limitation of year 2038 on it. Instead of asking my question in bulk, I preferred to break it up into small parts so that it is easy for novice users to understand as well. So my question(s):
...
What is the correct way to start a mongod service on linux / OS X?
I've installed mongodb and have been able to run it, work with it, do simple DB read / write type stuff. Now I'm trying to set up my Mac to run mongod as a service.
...
Disable firefox same origin policy
...king on the latest Firefox (build 36.0.1) released March 5, 2015.
I tested it and it's working on both Windows 7 and Mavericks. I'll guide you throught the steps to get it working.
1) Getting the extension
You can either download the xpi from here (author builds) or from here
(mirror, may not be ...
Why does Stream not implement Iterable?
...le have already asked the same on the mailing list ☺. The main reason is Iterable also has a re-iterable semantic, while Stream is not.
I think the main reason is that Iterable implies reusability, whereas Stream is something that can only be used once — more like an Iterator.
If Stream...