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David McKeone dmckeone

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@dypsilon
dypsilon / frontendDevlopmentBookmarks.md
Last active May 5, 2025 13:05
A badass list of frontend development resources I collected over time.
@branneman
branneman / call-apply-bind-proxy.js
Last active April 19, 2025 05:17
JavaScript call() vs apply() vs bind() vs $.proxy()
var fn = function(arg1, arg2) {
var str = '<p>aap ' + this.noot + ' ' + arg1 + ' ' + arg2 + '</p>';
document.body.innerHTML += str;
};
var context = {
'noot': 'noot'
};
var args = ['mies', 'wim'];
// Calls a function with a given 'this' value and arguments provided individually.
@paulirish
paulirish / performance.now()-polyfill.js
Last active December 11, 2024 09:06
performance.now() polyfill (aka perf.now())
// @license http://opensource.org/licenses/MIT
// copyright Paul Irish 2015
// Date.now() is supported everywhere except IE8. For IE8 we use the Date.now polyfill
// github.com/Financial-Times/polyfill-service/blob/master/polyfills/Date.now/polyfill.js
// as Safari 6 doesn't have support for NavigationTiming, we use a Date.now() timestamp for relative values
// if you want values similar to what you'd get with real perf.now, place this towards the head of the page
// but in reality, you're just getting the delta between now() calls, so it's not terribly important where it's placed
@mikeando
mikeando / Demo.c
Last active November 23, 2024 12:14
Example of using C++ from C.
#include "HMyClass.h"
#include <stdio.h>
void my_eh( const char * error_message, void * unused)
{
printf("my_eh: %s\n", error_message);
}
int main()
{
@femmerling
femmerling / authenticate.py
Last active June 18, 2024 10:59
I have to create user authentication using python-ldap. After googling around and trying out stuffs, this is the final code for you to use. Please remember to adjust the user_dn, and base_dn accordingly to the format used in your LDAP server.
# to be able to import ldap run pip install python-ldap
import ldap
if __name__ == "__main__":
ldap_server="x.x.x.x"
username = "someuser"
password= "somepassword"
# the following is the user_dn format provided by the ldap server
user_dn = "uid="+username+",ou=someou,dc=somedc,dc=local"
@jboner
jboner / latency.txt
Last active May 16, 2025 18:19
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@liamcurry
liamcurry / gist:2597326
Created May 4, 2012 19:56
Vanilla JS vs jQuery

Moving from jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})
@dbarnett
dbarnett / jsonalchemy.py
Created February 3, 2012 15:10
JSONAlchemy: Proper JSON marshalling and mutation tracking in SQLAlchemy
import simplejson
import sqlalchemy
from sqlalchemy import String
from sqlalchemy.ext.mutable import Mutable
class JSONEncodedObj(sqlalchemy.types.TypeDecorator):
"""Represents an immutable structure as a json-encoded string."""
impl = String
@mmrwoods
mmrwoods / postgres
Created January 20, 2012 13:47
Postgres maintenance crontab file
# dump all databases once every 24 hours
45 4 * * * root nice -n 19 su - postgres -c "pg_dumpall --clean" | gzip -9 > /var/local/backup/postgres/postgres_all.sql.gz
# vacuum all databases every night (full vacuum on Sunday night, lazy vacuum every other night)
45 3 * * 0 root nice -n 19 su - postgres -c "vacuumdb --all --full --analyze"
45 3 * * 1-6 root nice -n 19 su - postgres -c "vacuumdb --all --analyze --quiet"
# re-index all databases once a week
0 3 * * 0 root nice -n 19 su - postgres -c 'psql -t -c "select datname from pg_database order by datname;" | xargs -n 1 -I"{}" -- psql -U postgres {} -c "reindex database {};"'