kopiro

cmd="defaults read"; left=$(eval $cmd); while true; do right=$(eval $cmd); diff <( printf '%s' "$left") <( printf '%s' "$right"); left="$right"; sleep 1; done

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

RomainBoulay

# No results from tests or mocks files: 
Workspace - None of the following conditions are met - Filename  - matches regex
(.*(Spec|Test|Mock)s?\.)|(Mock).*


# Only search in swift files:
Workspace - All of the following conditions are met - File Extension  - is Equal to
swift

JohnSundell

/**
 *  Perform a throwing expression, and throw a custom error in case the expression threw
 *
 *  - parameter expression: The expression to execute
 *  - parameter error: The custom error to throw instead of the expression's error
 *  - throws: The given error
 *  - returns: The return value of the given expression
 */
func perform<T>(_ expression: @autoclosure () throws -> T, orThrow errorExpression: @autoclosure () -> Error) throws -> T {
    do {

kgn

#!/usr/bin/env python

try:
    # For Python 3.0 and later
    from urllib.request import urlopen
except ImportError:
    # Fall back to Python 2's urllib2
    from urllib2 import urlopen

import json

MugunthKumar

- (NSString *)description {
  
  __block NSMutableString *displayString = [NSMutableString stringWithFormat:@"curl -v -X %@", self.HTTPMethod];
  
  [displayString appendFormat:@" \'%@\'",  self.URL.absoluteString];
  
  [self.allHTTPHeaderFields enumerateKeysAndObjectsUsingBlock:^(id key, id val, BOOL *stop) {
    [displayString appendFormat:@" -H \'%@: %@\'", key, val];
  }];
  

mbinna

#!/usr/bin/env bash

rm -rf "${HOME}/Library/Caches/CocoaPods"
rm -rf "`pwd`/Pods/"
pod update