Leo Dirac srleo

srleo / .gitconfig

Created July 5, 2013 18:41

Useful gitconfig

	[alias]
	lgb = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --abbrev-commit --date=relative --branches

srleo / groupby.js

Last active December 19, 2015 09:49

Basic group-by count using mongodb aggregation

	count_by = function(collection,field) {
	return collection.aggregate({
	$group: {
	_id: "$" + field,
	count: { $sum: 1 }
	}
	})
	}

	count_by(db.vid10,'char');

srleo / gist:5688438

Last active December 17, 2015 23:19

mongodb command line function to add a 'rand' field to every document in a collection.


	function add_rand_field(collection) {
	collection.find().forEach(function(data) {
	collection.update({_id:data._id}, {
	$set:{rand:Math.random()}
	});
	});
	collection.ensureIndex({rand:1},{background:true})
	}