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Cleanest way to write retry logic?
Occasionally I have a need to retry an operation several times before giving up. My code is like:
29 Answers
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How can I enable zoom in on UIWebView which inside the UIScrollView?
...page in code to display, and I want it to remain at the previous size, but allow my users to zoom in with pinch zooming
– Dan F
May 9 '11 at 18:50
33
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Why are we not to throw these exceptions?
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Exception is the base type for all exceptions, and as such terribly unspecific. You shouldn’t ever throw this exception because it simply does not contain any useful information. Calling code catching for exceptions couldn’t disambiguate the intentiona...
Timeout command on Mac OS X?
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You can use
brew install coreutils
And then whenever you need timeout, use
gtimeout
..instead. To explain why here's a snippet from the Homebrew Caveats section:
Caveats
All commands have been installed with the prefix 'g'.
If ...
Table row and column number in jQuery
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Off the top of my head, one way would be to grab all previous elements and count them.
$('td').click(function(){
var colIndex = $(this).prevAll().length;
var rowIndex = $(this).parent('tr').prevAll().length;
});
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Split string using a newline delimiter with Python
... # ['a,b,c', 'd,e,f', 'g,h,i', 'j,k,l']
str.split, by default, splits by all the whitespace characters. If the actual string has any other whitespace characters, you might want to use
print(data.split("\n")) # ['a,b,c', 'd,e,f', 'g,h,i', 'j,k,l']
Or as @Ashwini Chaudhary suggested in the comm...
TypeError: 'dict_keys' object does not support indexing
...keys object behaves a lot more like just the keys half of a dict. Specifically, they support O(1) membership testing (and other set-like methods that can be implemented efficiently on top of that fact). These things aren't possible with a list and if you want a list of the dict's keys, you've alwa...
Ruby, Difference between exec, system and %x() or Backticks
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system
The system method calls a system program. You have to provide the command as a string argument to this method. For example:
>> system("date")
Wed Sep 4 22:03:44 CEST 2013
=> true
The invoked program will use the current STDIN, STDO...
SELECT DISTINCT on one column
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this is really useful case in any various duplication thank you
– ASLIM
Jan 13 at 8:08
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Android LinearLayout Gradient Background
...the colors and it did not work for me. Once I got the alpha channel set it all worked!
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