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ActiveRecord: size vs count
...many association, size will use the cached count directly, and not make an extra query at all.
class Image < ActiveRecord::Base
belongs_to :product, counter_cache: true
end
class Product < ActiveRecord::Base
has_many :images
end
> product = Product.first # query, load product into m...
What is the type of lambda when deduced with “auto” in C++11?
... pretty(T && t) { return __PRETTY_FUNCTION__; }, and strip off the extra if it starts to get crowded. I prefer to see the steps shown in template substitution. If you're missing __PRETTY_FUNCTION__, there are alternatives for MSVC, etc., but the results are always compiler-dependent for the ...
BestPractice - Transform first character of a string into lower case
I'd like to have a method that transforms the first character of a string into lower case.
11 Answers
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How to append data to div using JavaScript?
...
Try this:
var div = document.getElementById('divID');
div.innerHTML += 'Extra stuff';
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SQL order string as number
...o number
select col from yourtable
order by col + 0
BTW MySQL converts strings from left to right. Examples:
string value | integer value after conversion
--------------+--------------------------------
'1' | 1
'ABC' | 0 /* the string does not contain a number, so the re...
How long is the SHA256 hash?
...256', 'hello, world!');
var_dump($hash);
Will give you :
$ php temp.php
string(64) "68e656b251e67e8358bef8483ab0d51c6619f3e7a1a9f0e75838d41ff368f728"
i.e. a string with 64 characters.
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XAMPP, Apache - Error: Apache shutdown unexpectedly
...and solved it by making sure that each directory specified in /apache/conf/extras/httpd-bhosts.conf were actual paths.
– Matthew
Mar 20 '15 at 23:43
8
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IIS7: HTTP->HTTPS Cleanly
...ontext.Request.IsSecureConnection)
Response.Redirect(Context.Request.Url.ToString().Replace("http:", "https:"));
}
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Using PHP with Socket.io
...th php/mysql/static files only) with adsl subscription, without paying any extra. So no, being able to buy crappy VPS for $5 is definitely not a solution.
– Olli
Apr 1 '12 at 12:51
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When should I use the Visitor Design Pattern? [closed]
... be a directory or an XML tag.
[If your a Java person, imagine of a lot of extra methods to build and maintain the children list.]
class TreeNode( object ):
def __init__( self, name, *children ):
self.name= name
self.children= children
def visit( self, someVisitor ):
...