gaearon

If you haven’t worked with JavaScript in the last few years, these three points should give you enough knowledge to feel comfortable reading the React documentation:

• We define variables with let and const statements. For the purposes of the React documentation, you can consider them equivalent to var.
• We use the class keyword to define JavaScript classes. There are two things worth remembering about them. Firstly, unlike with objects, you don't need to put commas between class method definitions. Secondly, unlike many other languages with classes, in JavaScript the value of this in a method [depends on how it is called](https://developer.mozilla.org/en-US/docs/Web/Jav

belsrc

/**
 * Changes value to past tense.
 * Simple filter does not support irregular verbs such as eat-ate, fly-flew, etc.
 * http://jsfiddle.net/bryan_k/0xczme2r/
 *
 * @param {String} value The value string.
 */
Vue.filter('past-tense', function(value) {
  // Slightly follows http://www.oxforddictionaries.com/us/words/verb-tenses-adding-ed-and-ing
  var vowels = ['a', 'e', 'i', 'o', 'u'];

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

massiws

<?php

/**
 * Count the number of working days between two dates.
 *
 * This function calculate the number of working days between two given dates,
 * taking account of the Public festivities, Easter and Easter Morning days,
 * the day of the Patron Saint (if any) and the working Saturday.
 *
 * @param   string  $date1    Start date ('YYYY-MM-DD' format)

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'