大约有 47,000 项符合查询结果（耗时：0.0645秒） [XML]
Can I use a binary literal in C or C++?
...'ve seen a number of embedded-systems compilers that support it. I don't know any particular reason it shouldn't be a standard language feature.
– supercat
Aug 1 '11 at 21:34
5
...
Passing a String by Reference in Java?
...that assignment creates a new string object that the copy of the reference now points to. The original reference still points to the empty string.
This would be the same for any object, i.e., setting it to a new value in a method. The example below just makes what is going on more obvious, but co...
Efficient way to determine number of digits in an integer
...
Well, the most efficient way, presuming you know the size of the integer, would be a lookup. Should be faster than the much shorter logarithm based approach. If you don't care about counting the '-', remove the + 1.
// generic solution
template <class T>
int nu...
Good Hash Function for Strings
...
@maq I do believe you are correct. Don't know what I was thinking.
– Jack Straub
Dec 1 '18 at 9:48
|
show 2...
How to override to_json in Rails?
...e creation of the json should be separate from the rendering of the json.
Now, anytime to_json is called on an object, as_json is invoked to create the data structure, and then that hash is encoded as a JSON string using ActiveSupport::json.encode. This happens for all types: object, numeric, date,...
conditional unique constraint
... way to pass the values being inserted or updated to the function, do you know how to ?
– np-hard
May 14 '09 at 22:11
...
Mongoose and multiple database in single node.js project
...goose = require("./foo_db_connect.js"); // bar_db_connect.js for bar app
Now, you can access multiple databases with mongoose.
share
|
improve this answer
|
follow
...
Signed to unsigned conversion in C - is it always safe?
...implementation-defined or an implementation-defined signal is raised.
Now we need to refer to (2) above. Your i will be converted to an unsigned value by adding UINT_MAX + 1. So the result will depend on how UINT_MAX is defined on your implementation. It will be large, but it will not overflow,...
Why can't I reference System.ComponentModel.DataAnnotations?
...or 2010. I added this file and it seems to 'work', in that IntelliSense is now recognizing attributes on class members, such as [Display(Name = "My Property Name")]. Whether or not this works for everything else in this .dll I don't know.]
(1)
Microsoft Visual Studio Professional 2013
Version 12...
Measuring the distance between two coordinates in PHP
...
@TreyA - Yes i know, i'm not sure what you want to say with that. Have you tested the function and did it calculate a wrong result? And have you looked at the formula in Wikipedia? You should really do a test of your own and give me an examp...