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How to add images to README.md on GitHub?
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32 Answers
32
Active
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Swift - class method which must be overridden by subclass
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Con: The "superclass" (protocol) cannot implement methods or properties
2. Assert in the super version of the method
Example:
class SuperClass {
func someFunc() {
fatalError("Must Override")
}
}
class Subclass : SuperClass {
override func someFunc() {
}
}
Pro: Can imp...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
I have taken Problem #12 from Project Euler as a programming exercise and to compare my (surely not optimal) implementations in C, Python, Erlang and Haskell. In order to get some higher execution times, I search for the first triangle number with more than 1000 divisors instead of 500 as stated...
Check if character is number?
I need to check whether justPrices[i].substr(commapos+2,1) .
22 Answers
22
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Postgresql aggregate array
...nt name on GROUP BY.
CREATE TABLE grade
(Student_id int, Mark varchar(2));
INSERT INTO grade
(Student_id, Mark)
VALUES
(1, 'A'),
(2, 'B'),
(2, 'B+'),
(3, 'C'),
(3, 'A');
CREATE TABLE student
(Id int primary key, Name varchar(5));
INSERT INTO student
(Id, Name...
Error message 'Unable to load one or more of the requested types. Retrieve the LoaderExceptions prop
I have developed an application using Entity Framework , SQL Server 2000, Visual Studio 2008 and Enterprise Library.
35 ...
How do I limit the number of results returned from grep?
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249
The -m option is probably what you're looking for:
grep -m 10 PATTERN [FILE]
From man grep:...
Find first element in a sequence that matches a predicate
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260
To find first element in a sequence seq that matches a predicate:
next(x for x in seq if pred...
string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
...ractice is selecting the most appropriate one.
.Net Framework 4.0 Beta 2 has a new IsNullOrWhiteSpace() method for
strings which generalizes the IsNullOrEmpty() method to also include other white
space besides empty string.
The term “white space” includes all characters that are not...
Converting user input string to regular expression
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answered May 17 '09 at 14:26
GumboGumbo
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