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What is the purpose of “!” and “?” at the end of method names?
...the case. For example, Ruby Array#concat docs.ruby-lang.org/en/2.0.0/Array.html#method-i-concat. Where you can get burnt badly is something like MyActiveRecordModel.column_names.concat(...). Instead you must clone it before doing the concat.
– wintondeshong
Aug...
jQuery select all except first
...hich you want to hide the child elements except first. As an example:
<html>
<div class='some-group'>
<div class='child child-0'>visible#1</div>
<div class='child child-1'>xx</div>
<div class='child child-2'>yy</div>
</div>
...
Tips for debugging .htaccess rewrite rules
...nd can help you build your regexp skills.
Listing 1 -- regexpCheck.php
<html><head><title>Regexp checker</title></head><body>
<?php
$a_pattern= isset($_POST['pattern']) ? $_POST['pattern'] : "";
$a_ntests = isset($_POST['ntests']) ? $_POST['ntests'] : ...
Bash: infinite sleep (infinite blocking)
...ity will now actually sleep forever without looping: lists.gnu.org/archive/html/bug-gnulib/2020-02/msg00081.html
– Vladimir Panteleev
Feb 17 at 7:27
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...
Editing Javascript using Chrome Developer Tools
...l only allow you to edit javascript in its own file. Script embedded in an HTML (or PHP) file will remain read-only.
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CSS – why doesn’t percentage height work? [duplicate]
...ss specified otherwise, as wide as their parent all the way back up to <html>; so, the width of a block element is independent of its content and saying width: 50% yields a well defined number of pixels.
However, the height of a block element depends on its content unless you specify a specif...
What are Flask Blueprints, exactly?
...lication structure using blueprints. exploreflask.com/en/latest/blueprints.html
– Devasish
Jul 27 '17 at 5:25
5
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What is the difference between Amazon S3 and Amazon EC2 instance?
I need to create a web application using php mysql and html. The no.of requests and data will be very high. I need Amazon server space.
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MySQL: Transactions vs Locking Tables
... in progress.
http://dev.mysql.com/doc/refman/5.0/en/innodb-locking-reads.html
START TRANSACTION WITH CONSISTENT SNAPSHOT will not do the trick for you, as other transactions can still come along and modify that row. This is mentioned right at the top of the link below.
If other sessions simu...
What are the differences between “=” and “
...assignment operators.
http://stat.ethz.ch/R-manual/R-patched/library/base/html/assignOps.html
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