| namespace :backup do | |
| desc "Backup database" | |
| task :db do | |
| RAILS_ENV = "development" if !defined?(RAILS_ENV) | |
| app_root = File.join(File.dirname(__FILE__), "..", "..") | |
| settings = YAML.load(File.read(File.join(app_root, "config", "database.yml")))[RAILS_ENV] | |
| output_file = File.join(app_root, "..", "backup", "#{settings['database']}-#{Time.now.strftime('%Y%M%d')}.sql") | |
| system("/usr/bin/env mysqldump -u #{settings['username']} -p#{settings['password']} #{settings['database']} > #{output_file}") |
| The regex patterns in this gist are intended to match any URLs, | |
| including "mailto:foo@example.com", "x-whatever://foo", etc. For a | |
| pattern that attempts only to match web URLs (http, https), see: | |
| https://gist.github.com/gruber/8891611 | |
| # Single-line version of pattern: | |
| (?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’])) |
| # http://trevmex.com/post/3822870892/rails-one-liner-to-get-urls-from-rake-routes | |
| rake routes | sed -e "1d" -e "s,^[^/]*,,g" | awk '{print $1}' | sort | uniq |
| 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 |
| package main | |
| import ( | |
| // "encoding/binary" | |
| "crypto/rand" | |
| "fmt" | |
| "hash" | |
| "hash/fnv" | |
| "io" | |
| "io/ioutil" |
| package main | |
| /* | |
| #cgo CFLAGS: -x objective-c | |
| #cgo LDFLAGS: -framework Cocoa | |
| #import <Cocoa/Cocoa.h> | |
| int | |
| StartApp(void) { | |
| [NSAutoreleasePool new]; |
Simply replace things and thing with whatever large object you're iterating
over and put your iteration code in place of the code comment.
In ruby you can append with_index and an index variable to your enumerators
and it will give you an iterator counter (i). Using this we calculate a progress precentage:
(i.to_f / things.length * 100).to_i
| #!/usr/bin/env python | |
| from __future__ import print_function | |
| import json | |
| import logging | |
| from urllib2 import Request, urlopen, URLError, HTTPError | |
| from base64 import b64decode |
It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.
| --- | |
| AWSTemplateFormatVersion: 2010-09-09 | |
| Description: > | |
| A basic CloudFormation template for an RDS Aurora cluster. | |
| Parameters: | |
| DatabaseUsername: | |
| AllowedPattern: "[a-zA-Z0-9]+" | |
| ConstraintDescription: must be between 1 to 16 alphanumeric characters. |