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Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...ou can either declare the local count variable as
NSUInteger count;
or (if you are sure that your array will never contain more than 2^31-1 elements!),
add an explicit cast:
int count = (int)[myColors count];
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Coding Practices which enable the compiler/optimizer to make a faster program
...his can be a huge help for getting around aliasing slowdowns. For example, if your code looks like
void DoSomething(const Foo& foo1, const Foo* foo2, int numFoo, Foo& barOut)
{
for (int i=0; i<numFoo, i++)
{
barOut.munge(foo1, foo2[i]);
}
}
the compiler doesn't kno...
Save An Image To Application Documents Folder From UIView On IOS
...want to store these images in Core Data, since that can impact performance if the data set grows too large. Better to write the images to files.
NSData *pngData = UIImagePNGRepresentation(image);
This pulls out PNG data of the image you've captured. From here, you can write it to a file:
NSArray...
What is the printf format specifier for bool?
... _Bool or bool via stdbool.h . But is there also a printf format specifier for bool?
8 Answers
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Link to reload current page
...n also use .. to refer to the folder above the current path, for instance, if you have this file structure:
page1.html
folder1
page2.html
You can then in page2.html write:
<a href="../page1.html">link to page 1</a>
EDIT:
I'm not sure if the behaviour has changed or if it was a...
Set environment variables from file of key/value pairs
...
And if it's not from a file, use < <(commands that generate output)
– o11c
Aug 31 '17 at 0:10
5
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Evaluate expression given as a string
I'm curious to know if R can use its eval() function to perform calculations provided by e.g. a string.
7 Answers
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Should I put #! (shebang) in Python scripts, and what form should it take?
...iven in PEP 394, is that python can refer either to python2 or python3 on different systems. It currently refers to python2 on most distributions, but that is likely to change at some point.
Also, DO NOT Use:
#!/usr/local/bin/python
"python may be installed at /usr/bin/python or /bin/python i...
How do I use su to execute the rest of the bash script as that user?
...roject. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string.
9 ...
How can I provide multiple conditions for data trigger in WPF?
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@jasonk - Not sure if you can do that with a MultiTrigger. You can define two triggers for that..
– Gishu
Jun 29 '10 at 5:40
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