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Detecting endianness programmatically in a C++ program
...e warned against by compiler. That's exactly what unions are for !
bool is_big_endian(void)
{
union {
uint32_t i;
char c[4];
} bint = {0x01020304};
return bint.c[0] == 1;
}
The principle is equivalent to the type case as suggested by others, but this is clearer - and...
AngularJS ui-router login authentication
...al', ['$q', '$http', '$timeout',
function($q, $http, $timeout) {
var _identity = undefined,
_authenticated = false;
return {
isIdentityResolved: function() {
return angular.isDefined(_identity);
},
isAuthenticated: function() {
return _authenticated...
Which is faster: while(1) or while(2)?
...intel with an optimization flag):
With -O0:
.file "main.c"
.intel_syntax noprefix
.def __main; .scl 2; .type 32; .endef
.text
.globl main
.def main; .scl 2; .type 32; .endef
.seh_proc main
main:
push rbp
.seh_pushreg rbp
mov rbp,...
Stripping everything but alphanumeric chars from a string in Python
...ng.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
"import string" \
"''.join(ch for ch in string.printable if ch.isalnum())"
10000 loops, best of 3: 57.6 usec per loop
$ python -m tim...
Convert SVG to image (JPEG, PNG, etc.) in the browser
...
svgopen.org/2010/papers/62-From_SVG_to_Canvas_and_Back - Works perfectly! [On the link page, sourceSVG = $("#your_svg_elem_name").get(0) ]
– Vijay Singh
Apr 24 '16 at 17:40
...
Get the current first responder without using a private API
...IResponder+FirstResponder.m
#import "UIResponder+FirstResponder.h"
static __weak id currentFirstResponder;
@implementation UIResponder (FirstResponder)
+(id)currentFirstResponder {
currentFirstResponder = nil;
[[UIApplication sharedApplication] sendAction:@selector(findFirstRe...
Preferred way to create a Scala list
...
That is, you can now work on that IndexedSeq:
scala> list.foldLeft(0)(_+_)
res0: Int = 55
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Get name of object or class
... use standard IIFE (for example with TypeScript)
var Zamboch;
(function (_Zamboch) {
(function (Web) {
(function (Common) {
var App = (function () {
function App() {
}
App.prototype.hello = function () {
co...
How to get these two divs side-by-side?
...
#parent_div_1, #parent_div_2, #parent_div_3 {
width: 100px;
height: 100px;
border: 1px solid red;
margin-right: 10px;
float: left;
}
.child_div_1 {
float: left;
margin-right: 5px;
}
Check working example at http://js...
When to use enumerateObjectsUsingBlock vs. for
...need to modify local variables" - not true; you can declare your locals as __block and they'll be writable in the block.
enumerateObjectsWithOptions:usingBlock: supports either concurrent or reverse enumeration.
with dictionaries, block based enumeration is the only way to retrieve the key and value...