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How do I create a category in Xcode 6 or higher?
... for the category interface and implementation is still working, so that's extra easy: type @interface-category and @implementation-category.
Import it from Xcode 5! Use this command:
cp -r /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Xcode/Templates/Fil...
How do I use itertools.groupby()?
... # equivalent
>>> def islower(s):
... """Return True if a string is lowercase, else False."""
... return s.islower()
>>> print_groupby(sorted("bCAaCacAADBbB"), keyfunc=islower)
key: 'False'--> group: ['A', 'A', 'A', 'B', 'B', 'C', 'C', 'D']
key: 'True'--> group...
Show constraints on tables command
...PRECISION, cols.NUMERIC_SCALE,
cols.COLUMN_TYPE, cols.COLUMN_KEY, cols.EXTRA,
cols.COLUMN_COMMENT, refs.REFERENCED_TABLE_NAME, refs.REFERENCED_COLUMN_NAME,
cRefs.UPDATE_RULE, cRefs.DELETE_RULE,
links.TABLE_NAME, links.COLUMN_NAME,
cLinks.UPDATE_RULE, cLinks.DELETE_RULE
FROM INFOR...
Find substring in the string in TWIG
I want to find substring of the string or check if there is no such substring using Twig. On the words, I need analogue of 'strstr' or 'strpos' in php.
I googled and searched this issue in stackoverflow but nothing found. Does someone know how to solve this problem?
...
How do I pull from a Git repository through an HTTP proxy?
... When I add this environment variable, msysgit doesn't print out anything extra. :(
– Andrew Arnott
Mar 29 '09 at 23:22
...
Difference between == and ===
...ook at example:
class Person : Equatable {
let ssn: Int
let name: String
init(ssn: Int, name: String) {
self.ssn = ssn
self.name = name
}
static func == (lhs: Person, rhs: Person) -> Bool {
return lhs.ssn == rhs.ssn
}
}
P.S.: Since ssn(social s...
How to access component methods from “outside” in ReactJS?
... 2016-09-19: Changed example to use ref callback per guidance from the ref String attribute docs.
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Is returning by rvalue reference more efficient?
...p;b) {
return std::move(a < b? a: b);
}
int main() {
const std::string s = min_(std::string("A"), std::string("B"));
fprintf(stderr, "min: %s\n", s.c_str());
return 0;
}
As an interesting observation, on my machine clang++ -O3 generates 54 instructions for code above versus 62 ins...
What is the “continue” keyword and how does it work in Java?
... most readable, and most reasonable way to do things, rather than creating extra variables just to make the loop exit look more clean.
– David R Tribble
Jun 11 '18 at 15:15
ad...
Insert, on duplicate update in PostgreSQL?
...th "id=3" does not already exist.
You can combine these two into a single string and run them both with a single SQL statement execute from your application. Running them together in a single transaction is highly recommended.
This works very well when run in isolation or on a locked table, but i...