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Dongkeun Lee zakaf

  • Seoul, South Korea
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@cenkalti
cenkalti / jenkins-home-git.sh
Last active November 8, 2024 11:48
Backup Jenkins home periodicallly with git.
#!/bin/bash
# Setup
#
# - Create a new Jenkins Job
# - Mark "None" for Source Control Management
# - Select the "Build Periodically" build trigger
# - configure to run as frequently as you like
# - Add a new "Execute Shell" build step
# - Paste the contents of this file as the command
@glenjamin
glenjamin / pool-transaction.js
Last active July 15, 2024 09:39
DB transaction from a connection pool in node-mysql
var mysql = require('mysql');
var pool = mysql.createPool('mysql://localhost');
inTransaction(pool, function(db, next) {
db.query("DELETE * FROM stuff", function(err) {
if (err) return next(err);
db.query("INSERT INTO stuff VALUES (1,2,3)", function(err) {
return next(err);
@psayre23
psayre23 / gist:c30a821239f4818b0709
Last active October 22, 2024 12:13
Runtime Complexity of Java Collections
Below are the Big O performance of common functions of different Java Collections.
List | Add | Remove | Get | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array
LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List
CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array