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class Heap | |
def initialize(type = :min) | |
@type = type | |
if @type == :min | |
@heap = [-1.0/0] | |
@compare = ->(a,b) { (a <=> b) < 0 } | |
elsif @type == :max | |
@heap = [1.0/0] | |
@compare = ->(a,b) { (b <=> a) > 0 } | |
else |
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#!/usr/bin/env ruby | |
require 'rubygems' | |
require 'aws-sdk' | |
class S3FolderUpload | |
attr_reader :folder_path, :total_files, :s3_bucket, :include_folder | |
attr_accessor :files | |
# Initialize the upload class |
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require 'rest-client' | |
RestClient.get(url, headers={}) | |
RestClient.post(url, payload, headers={}) |
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class ActiveRecord::Base | |
def self.import!(record_list) | |
raise ArgumentError "record_list not an Array of Hashes" unless record_list.is_a?(Array) && record_list.all? {|rec| rec.is_a? Hash } | |
return record_list if record_list.empty? | |
(1..record_list.count).step(1000).each do |start| | |
key_list, value_list = convert_record_list(record_list[start-1..start+999]) | |
sql = "INSERT INTO #{self.table_name} (#{key_list.join(", ")}) VALUES #{value_list.map {|rec| "(#{rec.join(", ")})" }.join(" ,")}" | |
self.connection.insert_sql(sql) |
type below:
brew update
brew install redis
To have launchd start redis now and restart at login:
brew services start redis
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http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query | |
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails | |
#payload: [{"kind"=>"person"}] | |
Segment.where("payload @> ?", [{kind: "person"}].to_json) | |
#data: {"interest"=>["music", "movies", "programming"]} | |
Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json) | |
Segment.where("data #>> '{interest, 1}' = 'movies' ") | |
Segment.where("jsonb_array_length(data->'interest') > 1") |