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How to set initial size of std::vector?
I have a vector<CustomClass*> and I put a lot of items in the vector and I need fast access, so I don't use list. How to set initial size of vector (for example to be 20 000 places, so to avoid copy when I insert new)?
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Proper way to declare custom exceptions in modern Python?
...oal is to follow whatever standard other exception classes have, so that (for instance) any extra string I include in the exception is printed out by whatever tool caught the exception.
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What happens when there's insufficient memory to throw an OutOfMemoryError?
I am aware that every object requires heap memory and every primitive/reference on the stack requires stack memory.
11 Answ...
What does dot (.) mean in a struct initializer?
...ws you to set specific fields of the struct by name in an initializer. Before this, the initializer needed to contain just the values, for all fields, in order -- which still works, of course.
So for the following struct:
struct demo_s {
int first;
int second;
int third;
};
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IIS7: HTTP->HTTPS Cleanly
...t have to remember all the steps you went through with the 403.4 custom error page or other special permissions, it just works.
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="HTTP to HTTPS redirect" stopProcessing="true">
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What is Ruby's double-colon `::`?
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:: is basically a namespace resolution operator. It allows you to access items in modules, or class-level items in classes. For example, say you had this setup:
module SomeModule
module InnerModule
class MyClass
CONSTANT = 4
end
end
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Differences between “java -cp” and “java -jar”?
...ATH and java -jar JAR_FILE_PATH ? Is one of them preferred to the other for running a Java application? I mean which one of these ways is more expensive for JVM (according to their machine resources usage)?
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List of lists changes reflected across sublists unexpectedly
... that you create a new list at each position. One way to do it is
[[1]*4 for _ in range(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder why * can't make independent objects the way the list comprehension does. That's b...
Use PHP composer to clone git repo
I'm trying to use composer to automatically clone a git repository from github that isn't in packagist but it's not working and I can't figure out what am I doing wrong.
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UITableViewCell with UITextView height in iOS 7?
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First of all, it is very important to note, that there is a big difference between UITextView and UILabel when it comes to how text is rendered. Not only does UITextView have insets on all borders, but also the text layout inside it is slightly differen...