大约有 40,000 项符合查询结果（耗时：0.0597秒） [XML]
What's the point of 'const' in the Haskell Prelude?
... Ahh so it's more of a 'function generator' - I use it with one argument, and it gives me a function (taking one argument) that always returns a constant value. So map (const 42) [1..5] results in [42, 42, 42, 42, 42].
– stusmith
Sep 13 '11 at 14...
How to handle exceptions in a list comprehensions?
...l the statements you want, so delegating the evaluation of the exception-prone sub-expression to a function, as you've noticed, is one feasible workaround (others, when feasible, are checks on values that might provoke exceptions, as also suggested in other answers).
The correct responses to the qu...
TypeScript function overloading
...erent if we compare to OO languages. In answer to another SO question, someone explained it with a nice example: Method overloading?.
Basically, what we are doing is, we are creating just one function and a number of declarations so that TypeScript doesn't give compile errors. When this code is com...
Remove duplicate rows in MySQL
...
The aforementioned bug @DarkMantis referred to and it's solution.
– Jordan Arseno
Jan 23 '13 at 20:47
...
Checking if a list is empty with LINQ
...
Or use one line and do return (source==null) ? true : !source.Any(); (If your not throwing an exception)
– Gage
Aug 26 '10 at 15:23
...
SQL - find records from one table which don't exist in another
...two tables:
This is the shortest statement, and may be quickest if your phone book is very short:
SELECT *
FROM Call
WHERE phone_number NOT IN (SELECT phone_number FROM Phone_book)
alternatively (thanks to Alterlife)
SELECT *
FROM Call
WHERE NOT EXISTS
(SELECT *
FROM Phone_book
...
How does one make a Zip bomb?
...
Citing from the Wikipedia page:
One example of a Zip bomb is the file
45.1.zip which was 45.1 kilobytes of compressed data, containing nine
layers of nested zip files in sets of
10, each bottom layer archive
containing a 1.30 gigabyte file for a
t...
What is a smart pointer and when should I use one?
What is a smart pointer and when should I use one?
14 Answers
14
...
Why is there no logical xor in JavaScript?
...nd of a ^= true to toggle booleans and it fails on some machines such as phones.
– Masadow
Jun 5 '15 at 15:14
...
Get a list of all git commits, including the 'lost' ones
...nce between a commit deliberately orphaned by commit --amend or rebase and one accidentally orphaned by working with a detached HEAD, say.
– Cascabel
Jan 24 '11 at 21:22
3
...