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How do I rename a column in a SQLite database table?
...mn name is changed both within the table definition itself and also within all indexes, triggers, and views that reference the column. If the column name change would result in a semantic ambiguity in a trigger or view, then the RENAME COLUMN fails with an error and no changes are applied.
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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...ceeds the size of the stack, and it has to be re-created. So there can actually, depending on the use case, be a performance increase when using new Array() because you can prevent the overflow from happening.
As pointed out in this answer, new Array(5) will not actually add five undefined items to...
Add file extension to files with bash
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second one adds an extension on all files, not just extensionless ones
– Jeff
Mar 24 '15 at 15:55
5
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What is The Rule of Three?
...in various contexts,
and we should understand what "copying an object" actually means.
Let us consider a simple example:
class person
{
std::string name;
int age;
public:
person(const std::string& name, int age) : name(name), age(age)
{
}
};
int main()
{
person a("Bjar...
When do we have to use copy constructors?
...ill be copied), so the first to be destroyed copy sharing the buffer will call delete[] successfully and the second will run into undefined behavior. You need deep copying copy constructor (and assignment operator as well).
Class::Class( const Class& another )
{
stored = new char[strlen(ano...
Docker - a way to give access to a host USB or serial device?
... give container access to host serial or USB port . Is there a trick which allows doing that?
9 Answers
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Setting ANDROID_HOME enviromental variable on Mac OS X
Could anybody post a working solution for setting ANDROID_HOME via the terminal?
12 Answers
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Can my enums have friendly names? [duplicate]
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Enum value names must follow the same naming rules as all identifiers in C#, therefore only first name is correct.
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How do I tokenize a string in C++?
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C++ standard library algorithms are pretty universally based around iterators rather than concrete containers. Unfortunately this makes it hard to provide a Java-like split function in the C++ standard library, even though nobody argues that this would be convenient. But wha...
Java: Integer equals vs. ==
...ison with == only works for numbers between -128 and 127.
Refer: #Immutable_Objects_.2F_Wrapper_Class_Caching
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