selfawaresoup

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;primitive types                   ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

42      ;;java.lang.Long

42.0    ;;java.lang.Double

"foo"   ;;java.lang.String

selfawaresoup

(defn fib [n]
  (->>
    (->
      (fn [[a b]] [b (+' a b)])
      (iterate [1 1]))
    (map first)
    (take n)))
  
(fib 5) ;; (1 1 2 3 5)

selfawaresoup

<?php

if (preg_match('/\.(?:png|jpg|jpeg|gif|js|css)$/', $_SERVER["REQUEST_URI"])) {
    return false;
} else {
    include __DIR__ . '/index.php';
}

selfawaresoup

$phi: 1.61803398874989; //"Golden Ratio"
$base-size: 1rem;

@function size($n) {
    $size: $base-size;

    @if $n > 0 {
        @for $i from 1 through $n {
            $size: $size * $phi;
        }

selfawaresoup

Getting milliseconds from a DateTime

Task: get the millisecond component as an actual number (not a string) from a native "datetime" object of some popular dynamic languages.

Ruby

This is incomprehensible

DateTime.now.to_time.to_f % 1 * 1000

selfawaresoup

Installation

Copy typo.php somewhere in your $PATH and rename it to typo (or whatever you like).

Usage

typo some_file

selfawaresoup

Launch named session

screen -S <name>

Disconnect

C-a d

selfawaresoup

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain user

selfawaresoup

Extract one specific line with AWK

• awk 'NR==40550{print;exit}' <file>

Extract line 40550 to 40601:

• sed '40602q;40550,40601!d' <file>
• awk 'NR==40550,NR==40601' <file>

Extract line 60451 and 68451:

• sed -n '68452q;60451p;68451p' <file>
• awk 'FNR==60451 || FNR==68451 {print}; FNR==68452 {exit}'

selfawaresoup

Generate 1GB files quickly (instantly):

dd if=/dev/zero of=test.img bs=1024 count=0 seek=$[1024*1024]

Generate 1GB files with realistic copy delay:

dd if=/dev/zero of=test.img bs=1024 coun=$[1024*1024] seek=0