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Run a callback only if an attribute has changed in Rails
...ods/Dirty.html
Before Saving (OPTIONAL CHANGE)
After modifying an object and before saving to the database, or within the before_save filter:
changes should now be changes_to_save
changed? should now be has_changes_to_save?
changed should now be changed_attribute_names_to_save
<attribute>_...
UILabel is not auto-shrinking text to fit label size
...dicating whether the font size should be reduced in order to fit the title string into the label’s bounding rectangle (this property is effective only when the numberOfLines property is set to 1).
When setting this property, minimumScaleFactor MUST be set too (a good default is 0.5).
Swift
var adj...
How to get object size in memory? [duplicate]
...(in C#). for example how much my Hashtable , or SortedList , or List<String> .
6 Answers
...
Primary key/foreign Key naming convention [closed]
... group we have a raging debate regarding the naming convention for Primary and Foreign Keys. There's basically two schools of thought in our group:
...
What is the cleanest way to ssh and run multiple commands in Bash?
...ay have to deal with quoting issues. For instance, if you quote the "limit string" (ie. EOF in the above), then you can't do variable substitutions. But without quoting the limit string, variables are substituted. For example, if you have defined $NAME above in your shell script, you could do
ssh o...
How to embed a video into GitHub README.md?
...d in "Github Top-Level Project Page", github.io is the new domain for user and organization pages since April 2013.
The page GitHub publication is presented here)
This could be a feature request like the syntax highlighting was.
For instance: "HTML5 video in markdown" (August 2010):
Is there any w...
Show spinner GIF during an $http request in AngularJS?
...doing this be using the ng-class directive instead of using JQuery to show and hide elements?
– James Heald
Jan 11 '16 at 16:01
...
How to use a link to call JavaScript?
...rst one scrolls you to the top of the page.
– Matt Grande
Mar 27 '09 at 1:39
7
Yep it definitely ...
Why do we need virtual functions in C++?
... virtual modifier on/off to see what happens
//virtual
std::string Says() { return "?"; }
};
class Dog: public Animal
{
public: std::string Says() { return "Woof"; }
};
void test()
{
Dog* d = new Dog();
Animal* a = d; // refer to Dog instance with Animal pointer
...
Django - limiting query results
I want to take the last 10 instances of a model and have this code:
5 Answers
5
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