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What is the relative performance difference of if/else versus switch statement in Java?
... First create some interface:
public interface Action {
void execute(String input);
}
And get hold of all implementations in some Map. You can do this either statically or dynamically:
Map<String, Action> actions = new HashMap<String, Action>();
Finally replace the if/else or ...
Boolean Field in Oracle
... guess i should say double length twos complement floating point), Binary, string, etc. all assume a value is provided but database implementations always add a null value option Boolean isn't any different
– MikeT
Oct 7 '13 at 8:50
...
C++ SFINAE examples?
... a class or not:
int main(void) {
std::cout << IsClassT<std::string>::value << std::endl; // true
std::cout << IsClassT<int>::value << std::endl; // false
return 0;
}
...
What uses are there for “placement new”?
... on a
pre-allocated buffer takes less time):
char *buf = new char[sizeof(string)]; // pre-allocated buffer
string *p = new (buf) string("hi"); // placement new
string *q = new string("hi"); // ordinary heap allocation
You may also want to be sure there can be no allocation failure at ...
Why is require_once so bad to use?
...red. Every *_once call means checking that log. So there's definitely some extra work being done there but enough to detriment the speed of the whole app?
... I really doubt it... Not unless you're on really old hardware or doing it a lot.
If you are doing thousands of *_once, you could do the wo...
HTML-encoding lost when attribute read from input field
...ferenced here: Fastest method to replace all instances of a character in a string)
Some performance results here:
http://jsperf.com/htmlencoderegex/25
It gives identical result string to the builtin replace chains above. I'd be very happy if someone could explain why it's faster!?
Update 2015-03-0...
What's the best way to parse command line arguments? [closed]
...-query',
action="store", dest="query",
help="query string", default="spam")
It pretty much speaks for itself; at processing time, it will accept -q or --query as options, store the argument in an attribute called query and has a default value if you don't specify it. It is...
NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...例子：
Linux
DOS
;proc fileWrite – write a string to a file
fileWrite:
mov eax,4 ;write system call
mov ebx,[filedesc] ;File descriptor
mov ecx,stuffToWrite
mov edx,[stuffLen]
int 80h
ret
;endp fileWrite
proc fileWrite
mov ah,40h ...
How to find out where a function is defined?
...s a basic function that will scan your entire project files for a specific string and tell you which file it is in and which char position it starts at using only basic php.
Hope this helps someone...
<?php
$find="somefunction()";
echo findString('./ProjectFolderOrPath/',$find);
function find...
Get the generated SQL statement from a SqlCommand object?
...o the "text" command doesn't account for parameters etc
public static String ParameterValueForSQL(this SqlParameter sp)
{
String retval = "";
switch (sp.SqlDbType)
{
case SqlDbType.Char:
case SqlDbType.NChar:
case SqlDbType.NText:...