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Difference between rake db:migrate db:reset and db:schema:load
...e creates the database
db:drop deletes the database
db:schema:load creates tables and columns within the (existing) database following schema.rb
db:setup does db:create, db:schema:load, db:seed
db:reset does db:drop, db:setup
db:migrate:reset does db:drop, db:create, db:migrate
Typically, you woul...
How to style a checkbox using CSS
...leapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table style="width:100%">
<tr>
<td>Normal:</td>
<td><input type="checkbox" /></td>
<td><input type="checkbox" checked="checked" /></td>
<td>...
What are the most common font-sizes for H1-H6 tags [closed]
...d depend on the browser's default stylesheet. You can view an (unofficial) table of CSS2.1 User Agent stylesheet defaults here.
Based on the page listed above, the default sizes look something like this:
IE7 IE8 FF2 FF3 Opera Safari 3.1
H1 24pt 2em 32px ...
SQL Server - inner join when updating [duplicate]
...
this gives me ERROR: table name "ProductReviews" specified more than once in postgresql
– Johhan Santana
Apr 26 '17 at 16:54
1...
ffmpeg - Converting MOV files to MP4 [closed]
...a container packages multiple video and audio streams, adds a header and a table-of-contents. The Quicktime (mov) and MPEG (mp4) container work quite different, technically. If you just rename a Quicktime file into mp4, you pretend it to be a MPEG video, but it still remains a Quicktime container. P...
How many files can I put in a directory?
...
I had the same. I have migrated a table's blob column, each blob column I have exported as a file. It's around 8 million files :)
– Spike
Aug 26 '19 at 14:42
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What does O(log n) mean exactly?
...gorithm performance. Some grown faster as the input n grows. The following table demonstrates said growth numerically. In the table below think of log(n) as the ceiling of log_2.
Simple Code Examples Of Various Big O Categories:
O(1) - Constant Time Examples:
Algorithm 1:
Algorithm 1 prints...
How dangerous is it to access an array out of bounds?
...havior". The literal meaning of this is:
behavior, upon use of a nonportable or erroneous program construct or
of erroneous data, for which this International Standard imposes no
requirements
A non-normative note expands on this:
Possible undefined behavior ranges from ignoring the sit...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
...tabase entity and then pass the returned object to be persisted in another table.
5 Answers
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Placing Unicode character in CSS content value [duplicate]
...
Here's another list of arrows: unicode-table.com/en/sets/arrows-symbols Use the "U+" code, but replace the "U+" with "\". e.g. "U+25C0" becomes content: "\25C0";
– Luke
Dec 5 '14 at 15:26
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