This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.
| Description | Syntax |
|---|---|
| Get the length of a string | ${#VARNAME} |
| Get a single character | ${VARNAME[index]} |
| #!/usr/bin/zsh | |
| B="/usr/bin/btrfs" | |
| L="/usr/bin/logger" | |
| MOUNT="/mnt/" | |
| SNAPS="/mnt/snaps" | |
| HOTSNAPS="/mnt/hotsnaps" | |
| TODAY=$(/usr/bin/date +\%Y-\%m-\%d) | |
| YESTERDAY=$(/usr/bin/date +\%Y-\%m-\%d --date='yesterday') | |
| HOST=$(hostname) |
| ABSx Integer Absolute Value | |
| ADDx Integer Addition | |
| CMPx Integer Compare | |
| DIVx Integer Division | |
| MODx Integer Modulo Function | |
| MULx Integer Multiplication | |
| RANx Integer Random Number Generator | |
| SIGNx Integer Sign Function |
| ;---------------------------------------- | |
| ; JoeyLib | |
| ; Copyright (C) 2018-2019 Scott Duensing <[email protected]> | |
| ; | |
| ; This software is provided 'as-is', without any express or implied | |
| ; warranty. In no event will the authors be held liable for any damages | |
| ; arising from the use of this software. | |
| ; | |
| ; Permission is granted to anyone to use this software for any purpose, | |
| ; including commercial applications, and to alter it and redistribute it |
| ; | |
| ; Unpack a NULL terminated array of6-bit values | |
| ; from a packed array of 8-bits | |
| ; | |
| *= $800 | |
| unpack | |
| ldy #$00 ; first output byte | |
| ldx #$00 | |
| unpack1 | |
| lda input,x ; get a byte |
| *= $800 | |
| ; | |
| ; pack a null terminated array of bytes with values of $01 - $3f | |
| ; result is an array of packed 6-bit values | |
| ; useful for compressing text (VAL - $1F) by ~20% | |
| ; space = $01, @ = $02, A = $22, etc. | |
| ; | |
| ; Thanks to: http://retro.hansotten.nl/6502-sbc/kowalski-assembler-simulator/ |
| /* | |
| * Simple IP scanner | |
| * returns 1 if something was found, 0 if nothing was found | |
| * | |
| * $ flex -f lexer.l && gcc -O3 -o cutip lex.yy.c | |
| * <testfile cutip | |
| */ | |
| %{ | |
| int found = 0; | |
| %} |
| #define AbsoluteValue(Num) (Num>=0 ? Num : -Num) | |
| #define GetPrecentage(Numerator, Denominator) (Numerator*100/Denominator) | |
| #define SetBit(value, place) (value | (1 << place)) | |
| #define ClearBit(value, place) (value & (~(1 << place))) | |
| #define ToggleBit(value, place) (value ^ (1 << place)) | |
| #define GetBit(value, place) ((value >> place) & 1) | |
| #define GetMSB(value, datatype) GetBit(value, (sizeof(datatype) * 4 - 1)) | |
| #define GetLSB(value) GetBit(value, 0) |
| #include <stdint.h> | |
| #include <stdbool.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <errno.h> | |
| #include <arpa/inet.h> | |
| #include <sys/socket.h> | |
| #include <pthread.h> |