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Is there a way to get a collection of all the Models in your Rails app?
...ld) idea would be to use Ruby reflection to search for every classes that em>x m>tends ActiveRecord::Base. Don't know how you can list all the classes though...
EDIT: Just for fun, I found a way to list all classes
Module.constants.select { |c| (eval c).is_a? Class }
EDIT: Finally succeeded in listin...
String length in bytes in JavaScript
In my JavaScript code I need to compose a message to server in this format:
13 Answers
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Positioning MKMapView to show multiple annotations at once
...ude, annotation.coordinate.longitude);
topLeftCoord.latitude = fmam>x m>(topLeftCoord.latitude, annotation.coordinate.latitude);
bottomRightCoord.longitude = fmam>x m>(bottomRightCoord.longitude, annotation.coordinate.longitude);
bottomRightCoord.latitude = fmin(bottomRightCoord.lat...
Why does using an Underscore character in a LIKE filter give me all the results?
...
Modify your WHERE condition like this:
WHERE mycolumn LIKE '%\_%' ESCAPE '\'
This is one of the ways in which Oracle supports escape characters. Here you define the escape character with the escape keyword. For details see...
C++对象布局及多态探索之菱形结构虚继承 - C/C++ - 清泛网 - 专注C/C++及内核技术
...象的内存布局。
|C100,5 |C101,5 |C110,1 |C041,5 |
|ospt,4,11 |m,1 |ospt,4,6 |m,1 |m,1 |vtpt,4 |m1 |
(注：为了不折行，我用了缩写。ospt代表偏移值指针、m代表成员变量、vtpt代表虚表指针。第一个数字是该区域的大小，即字节数。只有偏...
Initializing a struct to 0
... first is easiest(involves less typing), and it is guaranteed to work, all members will be set to 0[Ref 1].
The second is more readable.
The choice depends on user preference or the one which your coding standard mandates.
[Ref 1] Reference C99 Standard 6.7.8.21:
If there are fewer in...
Using IQueryable with Linq
...
Marc Gravell's answer is very complete, but I thought I'd add something about this from the user's point of view, as well...
The main difference, from a user's perspective, is that, when you use IQueryable<T> (with a...
In JavaScript can I make a “click” event fire programmatically for a file input element?
...any browser that supports this, and then implemented another way for Firefom>x m> and those browsers that do not.
I don't know why you cannot do it, but one thing that is a security risk, and which you are not allowed to do in any browser, is programmatically set the file name on the HTML File element.
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Git rebase: conflicts keep blocking progress
I have a git branch (called v4), that was made from master just yesterday. There were a couple of changes to master, that I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line tem>x m>t file, that contains the version number. This file ...
How do I put a clear button inside my HTML tem>x m>t input bom>x m> like the iPhone does?
I want to have a nice little icon that, when clicked will clear the tem>x m>t in the bom>x m>.
9 Answers
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