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iPhone and OpenCV
...l port for the iPhone (iOS).
You can find all of OpenCV's releases here.
And find install instructions here:
Tutorials & introduction for the new version 3.x
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Floating point vs integer calculations on modern hardware
I am doing some performance critical work in C++, and we are currently using integer calculations for problems that are inherently floating point because "its faster". This causes a whole lot of annoying problems and adds a lot of annoying code.
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How to add percent sign to NSString
...e for percent sign in NSString format is %%. This is also true for NSLog() and printf() formats.
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Blocks and yields in Ruby
I am trying to understand blocks and yield and how they work in Ruby.
10 Answers
10
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How can I remove the first line of a text file using bash/sed script?
...you the last 5 lines of the input. The + sign kind of inverts the argument and make tail print anything but the first x-1 lines. tail -n +1 would print the whole file, tail -n +2 everything but the first line, etc.
GNU tail is much faster than sed. tail is also available on BSD and the -n +2 flag i...
How to convert IEnumerable to ObservableCollection?
...myIEnumerable);
This will make a shallow copy of the current IEnumerable and turn it in to a ObservableCollection.
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How to globally replace a forward slash in a JavaScript string?
... be done with "string".replace('/', 'ForwardSlash', 'g') but that is non-standard argument that works only in Firefox afaik.
– Seldaek
Dec 30 '10 at 22:46
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MySQL error 1449: The user specified as a definer does not exist
...M information_schema.views
WHERE table_schema='your-database-name';
Copy and run the ALTER statements
How to change the definer for stored procedures
Example:
UPDATE `mysql`.`proc` p SET definer = 'user@%' WHERE definer='root@%'
Be careful, because this will change all the definers for all d...
How can I deploy an iPhone application from Xcode to a real iPhone device?
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It sounds like the application isn't signed. Download ldid from Cydia and then use it like so: ldid -S /Applications/AccelerometerGraph.app/AccelerometerGraph
Also be sure that the binary is marked as executable: chmod +x /Applications/AccelerometerGraph.app/AccelerometerGraph
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Unpacking a list / tuple of pairs into two lists / tuples [duplicate]
...ifference can be important in some cases (e.g. append to it). So the list1 and list2 in the example should really be tuple1 and tuple2.
– Causality
Feb 29 '16 at 20:40
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