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@niksmac
niksmac / zmv-examples.md
Created March 7, 2017 05:58
ZMV-Examples (require autoload zmv)

rename a section of a filename, i. e. example.1.{txt,conf,db} or 12345.1.{wav,ogg,mp3} and

change the 1 to a 2 in the filename while preserving the rest of it.

$ zmv -n '(.)(<->)(.[^.]#)' '$1$(($2+1))$3' # would rename x.0001.y to x.2.y. $ zmv -n '(.0#)(<->)(.[^.]#)' '$1$(($2+1))$3'

Rename files to lower case

$ zmv '*' '${(L)f}'

serially all files (foo.foo > 1.foo, fnord.foo > 2.foo, ..)

$ autoload zmv

@vasanthk
vasanthk / System Design.md
Last active December 13, 2025 18:51
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@Technowise
Technowise / validate_fb_auth_token.php
Created May 10, 2013 06:51
Validate Facebook Auth-Token. This helper function checks if the Facebook auth-token is valid, and belongs to the said facebook-id
<?php
// A helper function to validate Facebook Auth-Token.
// This checks if the Facebook auth-token is valid, and belongs to the said facebook-id
function is_facebook_auth_valid($facebook_token, $facebook_id)
{
$ch = curl_init();
$url="https://graph.facebook.com/me?access_token=".$facebook_token;
curl_setopt($ch, CURLOPT_URL,$url );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);