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Benjamin E. Coe bcoe

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Last active May 3, 2019
Atomic Json modifications with Redis

Atomic Operations in Redis

Redis is a commonly used as a mini 'database' for caching, shared queues, and similar. It is generally fast & reliable for these tasks. Redis does not support nested data types, and misusing redis for this type of thing can end up with the situation described below.

Imagine that we want to store the following data in Redis:

set users '[{"user":"tim", "pages": ["aaa", "bbb"]}]'

0xabad1dea /
Last active May 4, 2022
Sorry, RSA, I'm just not buying it

Sorry, RSA, I'm just not buying it

I want to be extremely clear about three things. First, this is my personal opinion – insert full standard disclaimer. Second, this is not a condemnation of everyone at RSA, present and past. I assume most of them are pretty okay, and that the problem is confined to a few specific points in the company. However, “unknown problem people making major decisions at RSA” is a bit unwieldy, so I will just say RSA. Third, I'm not calling for a total boycott on RSA. I work almost literally across the street from them and I don’t want to get beat up by roving gangs of cryptographers at the local Chipotle.

RSA's denial published last night is utter codswallop that denies pretty much everything in the world except the actual allegations put forth by Reuters and hinted at for months by [other sources](http://li

pmarreck / rb_snowflake_id.rb
Created Dec 20, 2013
An implementation of Twitter's Snowflake ID generation algorithm in pure Ruby. Note: I didn't rewrite the bits that run this as a service. This is just the algorithm.
View rb_snowflake_id.rb
require 'monitor'
class IdWorker
attr_reader :worker_id, :datacenter_id, :reporter, :logger, :sequence, :last_timestamp
TWEPOCH = 1288834974657
romaonthego / htmltest.m
Created Sep 23, 2013
UITextView with HTML text (iOS 7)
View htmltest.m
- (void)viewDidLoad
[super viewDidLoad];
UITextView *textView = [[UITextView alloc] init];
textView.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:textView];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];
NSString *htmlString = @"<h1>Header</h1><h2>Subheader</h2><p>Some <em>text</em></p><img src='' width=70 height=100 />";
eprothro / shards.yml
Created Apr 12, 2013
Dynamic Octopus configuration for master/slave horizontal DB scaling with a Rails application on the Heroku stack. See the wiki page for more info: Props to Heroku for the idea, gleaned from the dynamic database.yml they inject at build-time for rails apps.
View shards.yml
require 'cgi'
require 'uri'
def attribute(name, value, force_string = false)
if value
value_string =
if force_string
'"' + value + '"'
jotto / google_oauth2_access_token.rb
Created Jun 14, 2012
ruby command line script for generating google oauth2 access token
View google_oauth2_access_token.rb
# (create oauth2 tokens from Google Console)
client_id = ""
client_secret = ""
# (paste the scope of the service you want here)
# e.g.:
scope = ""
raisch / regex_tokenizer.js
Created Jun 10, 2011
Regular Expression Sentence Tokenizer (English)
View regex_tokenizer.js
// tokenize(str)
// extracts semantically useful tokens from a string containing English-language sentences
// @param {String} the string to tokenize
// @returns {Array} contains extracted tokens
function tokenize(str) {
var punct='\\['+ '\\!'+ '\\"'+ '\\#'+ '\\$'+ // since javascript does not
'\\%'+ '\\&'+ '\\\''+ '\\('+ '\\)'+ // support POSIX character
'\\*'+ '\\+'+ '\\,'+ '\\\\'+ '\\-'+ // classes, we'll need our