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What is the difference between a definition and a declaration?

...// extern can be omitted for function declarations class foo; // no extern allowed for type declarations A definition actually instantiates/implements this identifier. It's what the linker needs in order to link references to those entities. These are definitions corresponding to the above declara...
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TimeStamp on file name using PowerShell

...g from the output of Get-ChildItem: Get-ChildItem *.zip | Foreach { "$($_.DirectoryName)\$($_.BaseName) $(get-date -f yyyy-MM-dd)$($_.extension)"} share | improve this answer | ...
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Why would I ever use push_back instead of emplace_back?

...ob is to generate the code you wrote. The optimizing compiler's job is actually to generate the code you would have written if you were an expert on platform-specific optimizations and did not care about maintainability, just performance. The actual difference between these two statements is that t...
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Change Oracle port from port 8080

... Production on Tue Aug 26 10:40:44 2008 Copyright (c) 1982, 2005, Oracle. All rights reserved. SQL> connect Enter user-name: system Enter password: <enter password if will not be visible> Connected. SQL> Exec DBMS_XDB.SETHTTPPORT(3010); [Assuming you want to have HTTP going to this po...
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(How) can I count the items in an enum?

... There's not really a good way to do this, usually you see an extra item in the enum, i.e. enum foobar {foo, bar, baz, quz, FOOBAR_NR_ITEMS}; So then you can do: int fuz[FOOBAR_NR_ITEMS]; Still not very nice though. But of course you...
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What happens if i return before the end of using statement? Will the dispose be called?

... Yes, Dispose will be called. It's called as soon as the execution leaves the scope of the using block, regardless of what means it took to leave the block, be it the end of execution of the block, a return statement, or an exception. As @Noldor...
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Draw in Canvas by finger, Android

...ur onDraw() you draw the paths using the paint of your choice. You should call invalidate() to refresh the view. To choose options you can click menu and choose the options. The below can be used as a reference. You can modify the below according to your needs. public class FingerPaintActivity ex...
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Align inline-block DIVs to top of container element

...round: aliceblue; vertical-align:top; } http://jsfiddle.net/Lighty_46/RHM5L/9/ Or as @f00644 said you could apply float to the child elements as well. share | improve this answer ...
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Get ffmpeg information in friendly way

...eed to tell ffprobe what information you want it to display (with the -show_format, -show_packets and -show_streams options) or it'll just give you blank output (like you mention in one of your comments). For example, ffprobe -v quiet -print_format json -show_format -show_streams somefile.asf would...
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How do I get bash completion to work with aliases?

...d also add __git_complete g __git_main to get code completition working on all git commands. – Ondrej Machulda Apr 15 '13 at 12:03 ...