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Most efficient way to cast List to List
...return statement, it is apparently fine to use it on an assignment, so the extra "result" variable solves this problem. (It should be optimized away either by the compiler or by the JIT anyway.)
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What to use as an initial version? [closed]
...rsion numbering
system, where updates have been
indicated by adding an extra digit at
the end of the decimal, so that the
version number asymptotically
approaches π. This is a reflection of
the fact that TeX is now very stable,
and only minor updates are
anticipated. The current ver...
Visibility of global variables in imported modules
...l = None
if 'MYVAL' in os.environ:
myval = os.environ['MYVAL']
As an extra precaution, handle the case when MYVAL is not defined inside the module.
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Go > operators
...ther languages, but because Go is a safer language than C/C++ it does some extra work when the shift count is a number.
Shift instructions in x86 CPUs consider only 5 bits (6 bits on 64-bit x86 CPUs) of the shift count. In languages like C/C++, the shift operator translates into a single CPU instru...
Send POST request using NSURLSession
...configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:@"[JSON SERVER"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
...
“is” operator behaves unexpectedly with integers
...
This can be a very fast check relative to say, checking if two very long strings are equal in value. But since it applies to the uniqueness of the object, we thus have limited use-cases for it. In fact, we mostly want to use it to check for None, which is a singleton (a sole instance existing in o...
What is the correct way to restore a deleted file from SVN?
...her changes once the merge is done before you commit. If you don't, those extra changes will also be reversed.
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When should one use HTML entities?
...ing using utf-8 text, there are a few thing to watch for.
XML needs some extra lines to validate when using entities.
Some libraries do not play along nice with utf-8. For instance, PHP in some Linux distributions dropped full support for utf-8 in their regular expression libraries.
It is harder t...
“Rate This App”-link in Google Play store app on the phone
... startActivity(rateIntent);
}
}
private Intent rateIntentForUrl(String url)
{
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(String.format("%s?id=%s", url, getPackageName())));
int flags = Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_MULTIPLE_TASK;
if (Buil...
What characters are allowed in DOM IDs? [duplicate]
... ID" you mean an attribute with the "ID" flag set, then the value is a "DOMString", the characters of which can be any UTF-16 encodable character.
16-bit unit
The base unit of a DOMString. This indicates that indexing on a DOMString
occurs in units of 16 bits. This must
not be misunders...