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Invalid argument supplied for foreach()
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edited Oct 27 '15 at 20:57
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Rails: how do I validate that something is a boolean?
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245
Since Rails 3, you can do:
validates :field, inclusion: { in: [ true, false ] }
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RabbitMQ message size and types
...ant to read up on their performance measures:
http://www.rabbitmq.com/blog/2012/04/17/rabbitmq-performance-measurements-part-1/
http://www.rabbitmq.com/blog/2012/04/25/rabbitmq-performance-measurements-part-2/
Queues are pretty light weight, you will most likely be limited by the number of connectio...
Direct casting vs 'as' operator?
... Otherwise, assigns o to s, even if o is null.
string s = o as string; // 2
Assigns null to s if o is not a string or if o is null. For this reason, you cannot use it with value types (the operator could never return null in that case). Otherwise, assigns o to s.
string s = o.ToString(); // 3
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How to use a RELATIVE path with AuthUserFile in htaccess?
...ork around that limitation.
We're using IfDefine together with an apache2 command line parameter:
.htaccess (suitable for both development and live systems):
<IfDefine !development>
AuthType Basic
AuthName "Say the secret word"
AuthUserFile /var/www/hostname/.htpasswd
Require vali...
Select by partial string from a pandas DataFrame
I have a DataFrame with 4 columns of which 2 contain string values. I was wondering if there was a way to select rows based on a partial string match against a particular column?
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Difference between binary tree and binary search tree
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12 Answers
12
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How do you clear a slice in Go?
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123
It all depends on what is your definition of 'clear'. One of the valid ones certainly is:
slic...
How to log SQL statements in Grails
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edited Jan 2 '18 at 15:32
answered Apr 2 '10 at 19:11
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.bashrc at ssh login
...Bash, thus all these comments are obsolete :)
– user529649
Jul 2 '12 at 2:09
1
This isn't necessa...