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What is the difference between an abstract function and a virtual function?
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An abstract function cannot have functionality. You're basically saying, any child class MUST give their own version of this method, however it's too general to even try to implement in the parent class.
A virtual function, is basically saying look, here's the functionality that ma...
fastest (low latency) method for Inter Process Communication between Java and C/C++
...sleep(0) (which as strace shows causes a single sched_yield() Linux kernel call to be executed) takes 0.3 microsecond - so named pipes scheduled to single core still have much overhead
Some shared memory measurement:
September 14, 2009 – Solace Systems announced today that its Unified Messagin...
Creating a UICollectionView programmatically
...lectionView];
// Do any additional setup after loading the view, typically from a nib.
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 15;
}
// The cell that is returned must be retrieved from a call to -dequeueReusableC...
Java 8: How do I work with exception throwing methods in streams?
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You need to wrap your method call into another one, where you do not throw checked exceptions. You can still throw anything that is a subclass of RuntimeException.
A normal wrapping idiom is something like:
private void safeFoo(final A a) {
try {
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Keyword not supported: “data source” initializing Entity Framework Context
...connection-string-for-ef
(Posted so others can get the fix faster than I did.)
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Character reading from file in Python
...The 'I don\xe2\x80\x98t like this' that you're seeing is what Python would call a str. It appears to be the utf-8 encoding of u'I don\u2018t like this', which is a unicode instance in Python. Try calling .decode('utf-8') on the former or .encode('utf-8') on the latter.
– Logan
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How to remove item from array by value? [duplicate]
...'s supported in IE9 and up.
What it does (from the doc link)
filter() calls a provided callback function once for each element in an array, and constructs a new array of all the values for which callback returns a value that coerces to true. callback is invoked only for indexes of the array whi...
Grab a segment of an array in Java without creating a new array on heap
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this still dynamically allocates a new memory segment and copies the range into that.
– Dan
Jun 3 '11 at 1:38
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How do I capture the output of a script if it is being ran by the task scheduler?
..., works great, and also logs output from child powershell scripts that are called from the task-scheduler-triggered bat/cmd Thanks!
– Jonesome Reinstate Monica
Mar 3 '16 at 19:28
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How to fix 'sudo: no tty present and no askpass program specified' error?
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this doesn't work for me (presumably because I'm calling ssh from a script), giving me the error Pseudo-terminal will not be allocated because stdin is not a terminal. :(
– knocte
Jul 17 '16 at 10:02
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