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How to use auto-layout to move other views when a view is hidden?

...iews, even though they don't draw, still participate in Auto Layout and usually retain their frames, leaving other related views in their places. When removing a view from its superview, all related constraints are also removed from that view hierarchy. In your case, this likely means: If you se...
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Simple logical operators in Bash

... What you've written actually almost works (it would work if all the variables were numbers), but it's not an idiomatic way at all. (…) parentheses indicate a subshell. What's inside them isn't an expression like in many other languages. It's a l...
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How do I set default values for functions parameters in Matlab?

...n, nargchk, etc. They're useful functions for this sort of thing. varargs allow you to leave a variable number of final arguments, but this doesn't get you around the problem of default values for some/all of them. share ...
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Java code To convert byte to Hexadecimal

... @polygenelubricants : Thanx a lot.. It seems, finally the code is working fine.. Is it safe to usen toHexString function now ? Or, there might be some loopholes with the approach ? – Vivek May 13 '10 at 11:28 ...
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Getting DOM elements by classname

...tains(concat(' ', normalize-space(@class), ' '), ' $classname ')]"); Basically, all we do here is normalize the class attribute so that even a single class is bounded by spaces, and the complete class list is bounded in spaces. Then append the class we are searching for with a space. This way we ar...
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How to add a new audio (not mixing) into a video using ffmpeg?

...dio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4 The -map option allows you to manually select streams / tracks. See FFmpeg Wiki: Map for more info. This example uses -c:v copy to stream copy (mux) the video. No re-encoding of the video occurs. Quality is preserved and the process is fast....
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Is it faster to count down than it is to count up?

... Is it really true? and if so does anyone know why? In ancient days, when computers were still chipped out of fused silica by hand, when 8-bit microcontrollers roamed the Earth, and when your teacher was young (or your teacher's tea...
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How does the new automatic reference counting mechanism work?

...rty assignments are inexpensive (as discussed here). I know I'm replacing all of my existing Mac GC code with ARC implementations. As to whether this could be extended to other languages, it seems geared around the reference counting system in Objective-C. It might be difficult to apply this to J...
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Check time difference in Javascript

... I know this is ancient, but where in all this gibberish does anything get read from form fields? All I see is some hard-coded example code. How do I get the difference between whatever times my user typed into my two input type="text" boxes, rather than between ...
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Is it possible to refresh a single UITableViewCell in a UITableView?

... The OP isn't animating anything, so there's no need to call the begin/endupdates – kubi Jul 15 '13 at 17:38 2 ...