qtxie

Am I out of order being annoyed at things like this? The naming has changed subtly, the direction is at the end in UIKit but at the start on AppKit. If I'm writing cross platform code then I need to either use the int values directly, which is bad practice, or use a define.


UIKit:
enum {
   NSTextAlignmentLeft      = 0,
   NSTextAlignmentCenter    = 1,
   NSTextAlignmentRight     = 2,
   NSTextAlignmentJustified = 3,
   NSTextAlignmentNatural   = 4,

qtxie

CGFloat GetLineHeightForFont(CTFontRef iFont)
{
    CGFloat lineHeight = 0.0;
 
    check(iFont != NULL);
 
    // Get the ascent from the font, already scaled for the font's size
    lineHeight += CTFontGetAscent(iFont);
 
    // Get the descent from the font, already scaled for the font's size

qtxie

CFMutableAttributedStringRef attributedString = NULL;
    CFRange stringRange = CFRangeMake(0, CFAttributedStringGetLength(attributedString));

    //color
    CGColorRef stringColor = nil;
    CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
    CGFloat colorComponents[] = {0.0f, 0.0f, 0.0f, 1.0f};
    stringColor = CGColorCreate(rgbColorSpace, colorComponents);
    CGColorSpaceRelease(rgbColorSpace);    
    

qtxie

; A minimal Mach-o x64 executable for OS X (also see below Mountain Lion version)
;
; $ nasm -f bin -o tiny_hello tiny_hello.s
; $ chmod +x tiny_hello
; $ ./tiny_hello
; Hello World!
; $

; c.f.
; http://osxbook.com/blog/2009/03/15/crafting-a-tiny-mach-o-executable/ ( the original tiny mach-o executable )

qtxie

#include <objc/runtime.h>
#include <objc/message.h>

#include <CoreFoundation/CoreFoundation.h>

/* ... */

/**
 * Return a character string that holds the current version
 * of the operating system which is equivalent to:

qtxie

system/view/auto-sync?: no

grid: collect [repeat i 50 [keep/only collect [repeat j 50 [keep random true]]]]
scratchgrid: collect [repeat i 50 [keep/only collect [repeat j 50 [keep false]]]]

a: copy grid/1
b: copy grid/50
c: collect [keep/only b keep grid keep/only a]

count-neighbors: function [gridd x y][

qtxie

Red [
    Title: "JSON parser"
    File: %json.red
    Author: "Nenad Rakocevic, Qingtian Xie"
    License: "BSD-3 - https://github.com/red/red/blob/master/BSD-3-License.txt"
]

json: context [
	quoted-char: charset {"\/bfnrt}
	exponent:	 charset "eE"

qtxie

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

qtxie

#!/bin/bash

# from http://habrahabr.ru/post/108240/
ncpus=`grep -ciw ^processor /proc/cpuinfo`
test "$ncpus" -gt 1 || exit 1

n=0
for irq in `cat /proc/interrupts | grep eth | awk '{print $1}' | sed s/\://g`
do
    f="/proc/irq/$irq/smp_affinity"

qtxie

// UIFontDescriptor on iOS 7 or later

    NSDictionary *traitsAttributes = @{UIFontSymbolicTrait: @(UIFontDescriptorTraitMonoSpace)};
    NSDictionary *fontAttributes = @{UIFontDescriptorTraitsAttribute: traitsAttributes};
    UIFontDescriptor *fontDescriptor = [UIFontDescriptor fontDescriptorWithFontAttributes:fontAttributes];
    NSArray *array = [fontDescriptor matchingFontDescriptorsWithMandatoryKeys:nil];
    for (UIFontDescriptor *descriptor in array) {
        NSLog(@"%@", descriptor.postscriptName);
//        NSLog(@"%@", [descriptor objectForKey:UIFontDescriptorNameAttribute]);
//        NSLog(@"%@", [descriptor objectForKey:UIFontDescriptorVisibleNameAttribute]);