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Adding 'serial' to existing column in Postgres
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If there is a chance that the target table was created by a different user, you'd need to do ALTER TABLE foo OWNER TO current_user; first.
– DKroot
Apr 6 '18 at 14:47
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Composer: how can I install another dependency without updating old ones?
... keep the others the way they are. So I've edited the composer.json , but if I run composer install , I get the following output:
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Getting individual colors from a color map in matplotlib
If you have a Colormap cmap , for example:
4 Answers
4
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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
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If at all possible, use generics. This includes:
List instead of ArrayList
Dictionary instead of HashTable
share
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impr...
How to overload functions in javascript?
...o argument overloading in Javascript:
Variable arguments - You can pass different sets of arguments (in both type and quantity) and the function will behave in a way that matches the arguments passed to it.
Default arguments - You can define a default value for an argument if it is not passed.
Nam...
Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...and additions. static_cast performs no runtime checks. This should be used if you know that you refer to an object of a specific type, and thus a check would be unnecessary. Example:
void func(void *data) {
// Conversion from MyClass* -> void* is implicit
MyClass *c = static_cast<MyClass*...
Does a `+` in a URL scheme/host/path represent a space?
...' .. 'z', // alpha
'0' .. '9', // digit
'-', '.', '_', '~':; // rest of unreserved characters as defined in the RFC-3986, p.2.3
else
begin
Result[I] := '%';
Insert('00', Result, I + 1);
Result[I + 1] := HexCharArrA[(Byte(C) shr 4...
Is Java Regex Thread Safe?
...rrent threads. Instances of the Matcher class are not safe for such use.
If you are looking at performance centric code, attempt to reset the Matcher instance using the reset() method, instead of creating new instances. This would reset the state of the Matcher instance, making it usable for the n...
Why is auto_ptr being deprecated?
...f assignments supported by auto_ptr
copy assignment (4) culprit
Now coming to the reason WHY the copy assignment itself was so disliked, I have this theory :
Not all programmers read books or standards
auto_ptr on the face of it, promises you ownership of the object
the little-* (pun in...
What's invokedynamic and how do I use it?
... the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better?
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