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When and why I should use session_regenerate_id()?
...hen people come to my site and log in I regenerate the session. It adds an extra layer of security that my newly logged in user is less likely to get hijacked.
Any time we add critical data to a session you should consider regenerating the session ID. If you need to harden your application against ...
@Scope(“prototype”) bean scope not creating new bean
...nd value of the @Scope annotation.
With this trick you can avoid to write extra code or to inject the ApplicationContext every time that you need a prototype inside a singleton bean.
Example:
@Service
@Scope(value="prototype", proxyMode=ScopedProxyMode.TARGET_CLASS)
public class LoginAction {}...
Combining “LIKE” and “IN” for SQL Server [duplicate]
...ple if your text was 'Hello World' it would find two matches and create an extra row in the results. The first line should be SELECT DISTINCT t.* to avoid this happening.
– Dave Sexton
Nov 16 '15 at 9:55
...
Write to UTF-8 file in Python
...
I believe the problem is that codecs.BOM_UTF8 is a byte string, not a Unicode string. I suspect the file handler is trying to guess what you really mean based on "I'm meant to be writing Unicode as UTF-8-encoded text, but you've given me a byte string!"
Try writing the Unicode st...
Seedable JavaScript random number generator
...in range [0,1]
return this.nextInt() / (this.m - 1);
}
RNG.prototype.nextRange = function(start, end) {
// returns in range [start, end): including start, excluding end
// can't modulu nextInt because of weak randomness in lower bits
var rangeSize = end - start;
var randomUnder1 = t...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...
If during the evaluation of an expression, the result is not mathematically defined or not in the range of
representable values for its type, the behavior is undefined. [ Note: most existing implementations of C++
ignore integer overflows. Treatment of division by zero, forming a remainde...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...AMD documents it and compilers don't expose it.)
(Yes, these instructions all run on the same execution unit).
This dependency doesn't just hold up the 4 popcnts from a single loop iteration. It can carry across loop iterations making it impossible for the processor to parallelize different loop...
In CMake, how can I test if the compiler is Clang?
... avoid any misspelling problem, I am using Case-insensitive compare, like:
string( TOLOWER "${CMAKE_CXX_COMPILER_ID}" COMPILER_ID )
if (COMPILER_ID STREQUAL "clang")
set(IS_CLANG_BUILD true)
else ()
set(IS_CLANG_BUILD false)
endif ()
For making the regex of MATCHES case-insensitive, I tried...
MySQL get the date n days ago as a timestamp
...
it appears (v1) DATE_SUB will return a DATETIME or STRING depending on inputs. TIMESTAMP (v2) is forcing it to a TIMESTAMP type. dev.mysql.com/doc/refman/5.1/en/…
– jsh
Apr 2 '14 at 18:39
...
Changing specific text's color using NSMutableAttributedString in Swift
...nge the textColor of certain text in a TextView. I am using a concatenated string, and just want the strings I am appending into the TextView's text. It appears that what I want to use is NSMutableAttributedString , but I am not finding any resources of how to use this in Swift. What I have so far ...