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Objective-C: Property / instance variable in category
...a single storage slot. So if you wanted to use this on multiple instances and have each instance compute a distinct value, it wouldn't work.
Fortunately, the Objective-C runtime has this thing called Associated Objects that can do exactly what you're wanting:
#import <objc/runtime.h>
stati...
Get Substring - everything before certain char
... Some example strings are below. The length of the string before - varies and can be any length
8 Answers
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What's the difference between session.Merge and session.SaveOrUpdate?
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if the object is versioned (by a <version> or <timestamp>), and the
version property value is the same value assigned to a newly
instantiated object, save() it
otherwise update() the object
and merge() is very different:
if there is a persistent instance with t...
Why isn't vector a STL container?
... &x = b[5]; // that's what really happens
bool y = b[5]; // implicitly converted to bool
assert(b[5] == false); // converted to bool
assert(b[6] == b[7]); // bool operator==(const reference &, const reference &);
b[5] = true; // assignment on reference
assert(b[5] == true); // and actua...
How do I remove duplicates from a C# array?
...sn't an answer. "How do I make pancakes?" "Put some ingredients in a bow and mix."
– Quarkly
Apr 4 at 19:21
1
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What are the differences between the BLOB and TEXT datatypes in MySQL?
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TEXT and CHAR will convert to/from the character set they have associated with time. BLOB and BINARY simply store bytes.
BLOB is used for storing binary data while Text is used to store large string.
BLOB values are treated as binary strings ...
How do you use variables in a simple PostgreSQL script?
For example, in MS-SQL, you can open up a query window and run the following:
10 Answers
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Visual studio long compilation when replacing int with double
... Omg, Microsoft, you're kidding me... Tnx for help, it's truly MSSE and .Net 4.0+ who are culprits
– Alex Zhukovskiy
Jun 7 '14 at 17:07
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Occurrences of substring in a string
...at this might or might not return the result expected. With substring "aa" and string to search "aaa" the number of occurences expected may be one (returned by this code), but may be two as well (in this case you'll need "lastIndex++" instead of "lastIndex += findStr.length()") depending on what you...
How to use QueryPerformanceCounter?
...eded to change from using milliseconds to microseconds for my Timer class, and after some research I've decided that QueryPerformanceCounter is probably my safest bet. (The warning on Boost::Posix that it may not works on Win32 API put me off a bit). However, I'm not really sure how to implement i...