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class CreateVideos < ActiveRecord::Migration | |
def change | |
create_table :videos do |t| | |
t.string :video | |
t.text :meta_info | |
t.timestamps | |
end | |
end | |
end |
require 'rblineprof' | |
module Rblineprof | |
module ConsoleHelpers | |
include Rblineprof::Helpers | |
def lineprof_block(options = {}, &block) | |
profile = lineprof(rblineprof_profiler_regex(options[:lineprofiler])) do | |
ret = yield | |
end |
Use these rapid keyboard shortcuts to control the GitHub Atom text editor on macOS.
You got your hands on some data that was leaked from a social network and you want to help the poor people.
Luckily you know a government service to automatically block a list of credit cards.
The service is a little old school though and you have to upload a CSV file in the exact format. The upload fails if the CSV file contains invalid data.
The CSV files should have two columns, Name and Credit Card. Also, it must be named after the following pattern:
YYYYMMDD
.csv.
A step by step guide wallthrough on how to access / read a NYT paywalled article
disable javascript
into the command prompt, but don't hit enterdisable javascript
commandI've been looking for the best Linux backup system, and also reading lots of HN comments.
Instead of putting pros and cons of every backup system I'll just list some deal-breakers which would disqualify them.
Also I would like that you, the HN community, would add more deal breakers for these or other backup systems if you know some more and at the same time, if you have data to disprove some of the deal-breakers listed here (benchmarks, info about something being true for older releases but is fixed on newer releases), please share it so that I can edit this list accordingly.
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literally always have to look up the meaning of :limit in migrations when it comes to integer values. Here's an overview. Now let's memorise it (oh, this works for MySQL, other databases may work differently): | |
:limit Numeric Type Column Size Max value | |
1 tinyint 1 byte 127 | |
2 smallint 2 bytes 32767 | |
3 mediumint 3 byte 8388607 | |
nil, 4, 11 int(11) 4 byte 2147483647 | |
5..8 bigint 8 byte 9223372036854775807 | |
Note: by default MySQL uses signed integers and Rails has no way (that I know of) to change this behaviour. Subsequently, the max. values noted are for signed integers. |
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