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Getting a list of files in a directory with a glob
...Bundle] bundlePath];
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *dirContents = [fm contentsOfDirectoryAtPath:bundleRoot error:nil];
NSPredicate *fltr = [NSPredicate predicateWithFormat:@"self ENDSWITH '.jpg'"];
NSArray *onlyJPGs = [dirContents filteredArrayUsingPredicate:fltr];
If...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
... thing is probably because no one in their right mind would ever create an array of string names for days (e.g., { "first", "second", "third", ..., "twenty-seventh", ... }) and try to index it by tm_mday. Then again, maybe they just saw the absolute utility in making off by one errors a regular occu...
HSL to RGB color conversion
... The saturation
* @param {number} l The lightness
* @return {Array} The RGB representation
*/
function hslToRgb(h, s, l){
var r, g, b;
if(s == 0){
r = g = b = l; // achromatic
}else{
var hue2rgb = function hue2rgb(p, q, t){
if(t < ...
Get index of element as child relative to parent
... with built-in DOM manipulation, get a collection of the li siblings in an array, and on click, check the indexOf the clicked element in that array.
const lis = [...document.querySelectorAll('#wizard > li')];
lis.forEach((li) => {
li.addEventListener('click', () => {
const ind...
How does this milw0rm heap spraying exploit work?
... lot of nop instructions before it and jump to somewhere there. The memory array will hold the actual x86 code along with the jumping mechanism. We'll feed the crafted XML to the library which has a bug. When it's being parsed, the bug will cause the instruction pointer register to be assigned to so...
How to check if a string is a valid JSON string in JavaScript without using Try/Catch
...{}) will be false, isJSON('{}') will be true.
To check if something is an Array or Object (parsed JSON):
// vanillaJS
function isAO(val) {
return val instanceof Array || val instanceof Object ? true : false;
}
// ES2015
var isAO = (val) => val instanceof Array || val instanceof Object ? tr...
Most efficient way to make the first character of a String lower case?
... would return "HI"). This was almost the fastest.
char c[] = string.toCharArray();
c[0] = Character.toLowerCase(c[0]);
string = new String(c);
test3 was a modification of test2, but instead of Character.toLowerCase(), I was adding 32, which works correctly if and only if the string is in ASCII. Th...
Compute a confidence interval from sample data
...ts
def mean_confidence_interval(data, confidence=0.95):
a = 1.0 * np.array(data)
n = len(a)
m, se = np.mean(a), scipy.stats.sem(a)
h = se * scipy.stats.t.ppf((1 + confidence) / 2., n-1)
return m, m-h, m+h
you can calculate like this way.
...
Is inline assembly language slower than native C++ code?
... inline assembly language and C++ code, so I wrote a function that add two arrays of size 2000 for 100000 times. Here's the code:
...
Download file of any type in Asp.Net MVC using FileResult?
...
Ok, I could try that, but what goes into the byte[] array?
– Anders
Aug 31 '10 at 15:40
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