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What algorithm can be used for packing rectangles of different sizes into the smallest rectangle pos
... and from top to bottom (called reverse-level) until the total width is at least 1/2. Then the reverse-level is dropped down until (at least) one of them touches some item below. The drop down is somehow repeated.
Approximation ratio: RF(I) <= 2·OPT(I).
Steinberg's algorithm
Steinberg's algorith...
Quickly find whether a value is present in a C array?
...t you can do with hand tuned assembly language. I tend to take the path of least resistance - for small routines like this, I just write asm code and have a good idea how many cycles it will take to execute. You may be able to fiddle with the C code and get the compiler to generate good output, but ...
Internet Explorer 8 Developer Tools not displaying
...e, but in some companies, this could be due to policies. In such cases, at least for me, it worked after modifying the registry like this
HKEY_LOCAL_MACHINE > SOFTWARE > POLICIES > MICROSOFT > INTERNET EXPLORER > IEDEVTOOLS
and then modifying the DISABLED value to 0, which was 1 for...
Why is “while ( !feof (file) )” always wrong?
... terminates. In all cases where while(!feof(p)) is used, there must be at least a check inside the loop for ferror(), or at the very least the while condition should be replaced with while(!feof(p) && !ferror(p)) or there is a very real possibility of an infinite loop, probably spewing all ...
Default height for section header in UITableView
...uped table view in iOS 5. I'm using 44, based on this question, and it at least appears to roughly the correct height.
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How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
...he same problem.
The solution is to upgrade gcc and g++ to version 4.4 at least.
Make sure your CC/CXX is set (exported) to right binaries before compiling.
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Abstract class in Java
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A Java class becomes abstract under the following conditions:
1. At least one of the methods is marked as abstract:
public abstract void myMethod()
In that case the compiler forces you to mark the whole class as abstract.
2. The class is marked as abstract:
abstract class MyClass
As al...
Best practices for API versioning? [closed]
...emain to be this one:
http://shonzilla/api/customers/1234
There are at least two redirection HTTP status codes that are appropriate for API versioning scenarios:
301 Moved permanently indicating that the resource with a requested URI is moved permanently to another URI (which should be a resou...
Auto-expanding layout with Qt-Designer
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Once you have add your layout with at least one widget in it, select your window and click the "Update" button of QtDesigner. The interface will be resized at the most optimized size and your layout will fit the whole window. Then when resizing the window, the la...
Show pending migrations in rails
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There is rake db:abort_if_pending_migrations (at least in Rails 2.3.3, not sure when it was introduced). The description says 'Raises an error if there are pending migrations'. This seems to be used more as a prerequisite for other tasks, but I'm guessing you could use it f...