大约有 40,000 项符合查询结果（耗时：0.0629秒） [XML]
How to use base class's constructors and assignment operator in C++?
I have a class B with a set of constructors and an assignment operator.
5 Answers
5
...
How to turn off CodeLens-References
...only way to undock a window after it's been docked. Turning off CodeLens resets the popup windows. Maddening. Your tip saved some of my sanity.
– Suncat2000
Nov 18 '19 at 22:42
...
Postgres: Distinct but only for one column
...SELECT DISTINCT ON ( expression [, ...] ) keeps only the first row of each set of rows where the given expressions evaluate to equal. The DISTINCT ON expressions are interpreted using the same rules as for ORDER BY (see above). Note that the “first row” of each set is unpredictable unless ORDER ...
PostgreSQL DISTINCT ON with different ORDER BY
...s:
DISTINCT ON ( expression [, ...] ) keeps only the first row of each set of rows where the given expressions evaluate to equal. [...] Note that the "first row" of each set is unpredictable unless ORDER BY is used to ensure that the desired row appears first. [...] The DISTINCT ON expression(s)...
Are default enum values in C the same for all compilers?
When declaring an enum as shown below, do all C compilers set the default values as x=0 , y=1 , and z=2 on both Linux and Windows systems?
...
:: (double colon) operator in Java 8
...ia of: take no argument and return double can be used.
Another example:
Set<String> set = new HashSet<>();
set.addAll(Arrays.asList("leo","bale","hanks"));
Predicate<String> pred = set::contains;
boolean exists = pred.test("leo");
In case of parameterized types:
class Param&l...
Difference between := and = operators in Go
What is the difference between the = and := operators, and what are the use cases for them? They both seem to be for an assignment?
...
How do I use the conditional operator (? :) in Ruby?
...
A simple example where the operator checks if player's id is 1 and sets enemy id depending on the result
player_id=1
....
player_id==1? enemy_id=2 : enemy_id=1
# => enemy=2
And I found a post about to the topic which seems pretty helpful.
...
Generate random numbers following a normal distribution in C/C++
...ross all platforms. I'm doing the tests now, and MSVC provides a different set of values from, for example, Clang. The C++11 engines seem to generate the same sequences (given the same seed), but the C++11 distributions seem to be implemented using different algorithms on different platforms.
...
Continuous Integration for Ruby on Rails? [closed]
...ded up with a thousand options, so the UI is confusing and it's a chore to set up your projects. But once you set it up you get a whole lot of plugins that can pull from most anywhere, run most anything, and report most everything. The OS X Installer points Jenkins at /Users/Shared/Jenkins/Home but ...