jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

imjasonh

* {
    font-size: 12pt;
    font-family: monospace;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    color: black;
    cursor: default;
}

sstephenson

Simple file/stream encryption using OpenSSL

Create and store a 512-byte random encryption key named secret:

$ mkkey secret

Encrypt the contents of file with the secret key and write it to file.enc:

$ encrypt secret < file > file.enc

aras-p

// Skybox shader that just draws flat texture in the background
Shader "Skybox/Background Texture"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		Tags { "Queue"="Background" "RenderType"="Background" "PreviewType"="Skybox" }

jasonrudolph

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

omz

// Usage example:
// input image: http://f.cl.ly/items/3v0S3w2B3N0p3e0I082d/Image%202011.07.22%2011:29:25%20PM.png
//
// UIImage *buttonImage = [UIImage ipMaskedImageNamed:@"UIButtonBarAction.png" color:[UIColor redColor]];

// .h
@interface UIImage (IPImageUtils)
+ (UIImage *)ipMaskedImageNamed:(NSString *)name color:(UIColor *)color;
@end

noopkat

⚠️ this is now stupidly out of date

Computers

• 13" Macbook Pro 3.3 GHz i7 (late 2016)
• Microsoft Surface Book (2016)

Peripherals

• Dell up3216q 32" monitor

zoul

@interface DownloadOperation : NSOperation
{
    NSURLRequest *request;
    NSURLConnection *connection;
    NSMutableData *receivedData;
}

@property(readonly) BOOL isExecuting;
@property(readonly) BOOL isFinished;

chockenberry

- (void)loadDefaultSettings
{
	NSMutableDictionary *defaults = [NSMutableDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Default-Settings" ofType:@"plist"]];
	
	// other setup...
	
	[[NSUserDefaults standardUserDefaults] registerDefaults:[NSDictionary dictionaryWithDictionary:defaults]];
}

- (void)resetDefaultSettings