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What is Regular Expression?

Regular expression is a group of characters or symbols which is used to find a specific pattern from a text.

A regular expression is a pattern that is matched against a subject string from left to right. The word "Regular expression" is a

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GNU screen quick reference

http://aperiodic.net/screen/quick_reference

How to Navigate, copy & paste content?

within screen sessions: Cntl a + [ : To start navigation using up/down arrow Press Space bar: To select content starting position

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Bash scripting cheatsheet

• by Lee2sman
• Updated 2017-09-18

Bash shebang

• #!/usr/bin/env bash for portability, or less good, #!/bin/bash

Commenting

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Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

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find . -name "*.html" | while read i; do mv "$i" "${i%.html}.php"; done

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// c - __attribute__((constructor)) equivalent in VC? - Stack Overflow
// http://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc/2390626#2390626
// Rev.5

    // Initializer/finalizer sample for MSVC and GCC/Clang.
    // 2010-2016 Joe Lowe. Released into the public domain.
#include <stdio.h>
#include <stdlib.h>

#ifdef __cplusplus