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@earthgecko
earthgecko / bash.generate.random.alphanumeric.string.sh
Last active November 9, 2024 08:57
shell/bash generate random alphanumeric string
#!/bin/bash
# bash generate random alphanumeric string
#
# bash generate random 32 character alphanumeric string (upper and lowercase) and
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)
# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 32 | head -n 1
@cihancimen
cihancimen / string_contains_emoji
Created November 26, 2012 00:54
Check if an NSString contains an emoji character
- (BOOL)stringContainsEmoji:(NSString *)string {
__block BOOL returnValue = NO;
[string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
const unichar hs = [substring characterAtIndex:0];
// surrogate pair
if (0xd800 <= hs && hs <= 0xdbff) {
if (substring.length > 1) {
const unichar ls = [substring characterAtIndex:1];
@Kametrixom
Kametrixom / emoji.swift
Created August 3, 2015 20:46
Gets all Emoji Unicode code points from the latest Unicode source and prints them out (as Emoji). Also: Prints out all country flag emojis from "AA" to "ZZ"
import Foundation
import XCPlayground
XCPSetExecutionShouldContinueIndefinitely()
func getAllEmojis(completion: String? -> ()) {
let url = NSURL(string: "http://www.unicode.org/Public/UCD/latest/ucd/EmojiSources.txt")!
NSURLSession.sharedSession().dataTaskWithURL(url) { data, response, error in
guard let data = data where error == nil else {
completion(nil)