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What is the “assert” function?
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assert will terminate the program (usually with a message quoting the assert statement) if its argument turns out to be false. It's commonly used during debugging to make the program fail more obviously if an unexpected condition occurs.
For example:
assert(len...
What are the differences between Deferred, Promise and Future in JavaScript?
...the differences between Deferreds, Promises and Futures?
Is there a generally approved theory behind all these three?
5 A...
One DbContext per web request… why?
...the DbContext caches data, it gets stale pretty soon. This will get you in all sorts of trouble when multiple users/applications work on that database simultaneously (which is very common of course). But I expect you already know that and just want to know why not to just inject a new instance (i.e....
Generate random string/characters in JavaScript
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@dan_waterworth, Actually, += is often faster for some reason, even used inside loops - jsperf.com/join-vs-concatenation
– Konrad Borowski
May 1 '13 at 12:29
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#1071 - Specified key was too long; max key length is 767 bytes
...data model regarding this entity to see if there's improvements that would allow you to implement the intended business rules without hitting the MySQL limitation.
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PHP code is not being executed, instead code shows on the page
...guration, here are a few things you can check:
Make sure that PHP is installed and running correctly. This may sound silly, but you never know. An easy way to check is to run php -v from a command line and see if returns version information or any errors.
Make sure that the PHP module is listed an...
What is a semaphore?
...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter.
It's simply a way to limit the number of consumers for a specific resource. For exampl...
HTML character decoding in Objective-C / Cocoa Touch
First of all, I found this: Objective C HTML escape/unescape , but it doesn't work for me.
13 Answers
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Set up adb on Mac OS X
... it up might be useful to some people. adb is the command line tool to install and run android apps on your phone/emulator
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When do you use map vs flatMap in RxJava?
...r Exception problem, just throw it with a Non checked exception : RX will call the onError handler for you.
Observable.from(jsonFile).map(new Func1<File, String>() {
@Override public String call(File file) {
try {
return new Gson().toJson(new FileReader(file), Object.c...