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What is an SSTable?
...ped IO is a very handy technique because it delegates the actual IO to the OS, assuming it can do a good job at caching (especially when several processes share the same file). But it has the disadvantage that you don't have control of it. If the page is not resident in memory, the thread will block...
Import existing source code to GitHub
...If you've got local source code you want to add to a new remote new git repository without 'cloning' the remote first, do the following (I often do this - you create your remote empty repository in bitbucket/github, then push up your source)
Create the remote repository, and get the URL such as gi...
How to execute a file within the python interpreter?
...lobal variables in the interpreter's global scope (the normal behavior in most scripting environments).
Python 3 exec Documentation
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Associative arrays in Shell scripts
...are built in to the shell. This should work in bash 4.0 (available now on most major distros, though not on OS X unless you install it yourself), ksh, and zsh:
declare -A newmap
newmap[name]="Irfan Zulfiqar"
newmap[designation]=SSE
newmap[company]="My Own Company"
echo ${newmap[company]}
echo ${ne...
Eclipse and Windows newlines
... that text files are saved in a format that is not specific to the Windows OS and most easily shared across heterogeneous developer desktops:
Navigate to the Workspace preferences (General:Workspace)
Change the Text File Encoding to UTF-8
Change the New Text File Line Delimiter to Other ...
iOS 7: UITableView shows under status bar
...l view insets which do actually stop it from scrolling under, but at the cost of keeping the top of the table view under. I've attempted to set the UITableView frame to offset by 20 pixels, but it doesn't appear to take effect and as I currently need the app to be compatible with iOS 6 I can't ju...
Are loops really faster in reverse?
...th each time you increment i, when you check if i <= array.length.
In most cases you shouldn't even worry about this kind of optimization.
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How do I change the number of open files limit in Linux? [closed]
...ot from /etc/system.
set rlim_fd_max = 166384
set rlim_fd_cur = 8192
On OS X, this same data must be set in /etc/sysctl.conf.
kern.maxfilesperproc=166384
kern.maxfiles=8192
Under Linux, these settings are often in /etc/security/limits.conf.
There are two kinds of limits:
soft limits are sim...
Why use armeabi-v7a code over armeabi code?
... when we speak about armeabi we speak about ARM architecture and GNU/Linux OS. Android follows the little-endian ARM GNU/Linux ABI.
armeabi application will run on ARMv5 (e.g. ARM9) and ARMv6 (e.g. ARM11). You may use Floating Point hardware if you build your application using proper GCC options li...
How do I find the next commit in git? (child/children of ref)
...esn't DWIM. It appears to list all the parents and their children. I suppose I can list them all and parse through them... bleh, but its something.
– Schwern
Feb 16 '10 at 22:36
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