大约有 1,690 项符合查询结果（耗时：0.0134秒） [XML]
Accessing an SQLite Database in Swift
...rashing. If I did a select count(col_name) from tablename where some_col = xxx, it works. What do you suggest?
– gbenroscience
Nov 30 '19 at 16:40
|
...
Difference between len() and .__len__()?
...ed an integer, non-negative, and less than 2**31 -- when you see a call to xxx.__len__(), you have no certainty (except that the code's author is either unfamiliar with Python or up to no good;-).
Other built-ins provide even more added value beyond simple sanity checks and readability. By uniforml...
How to throw a C++ exception
...henomena in action).
3) In case that the "some code due to the fact that XXX exception was thrown..." does important stuff WITH RESPECT to the exception type, there is misbehavior of your code here.
4) This is also relevant if the caught objects were "normal" object like: class Base{}; and class ...
What is the difference between UTF-8 and Unicode?
...te 4th Byte Number of Free Bits Maximum Expressible Unicode Value
0xxxxxxx 7 007F hex (127)
110xxxxx 10xxxxxx (5+6)=11 07FF hex (2047)
1110xxxx 10xxxxxx 10xxxxxx (4+6+...
How do you organize your version control repository?
...For example, addressing the issue of which versions are represented by the Xxx.jar and Yyy.exe, especially when there are literally a dozen copies being referenced.
– Rob Williams
Nov 20 '08 at 20:37
...
Why do this() and super() have to be the first statement in a constructor?
...self, sufficient to prevent this problem. The message is "cannot reference xxx before supertype constructor has been called". Therefore, checking that super is the first statement is not necessary.
– Joe Daley
Jul 23 '09 at 0:22
...
快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...less.js，并将less.js文件引入html页面中。
注意：
引入 XX.less 文件时，rel属性要设置为“stylesheet/less”
less.js 之前引入.less后缀的文件，即less.js最后引入。
运行环境
服务器运行（本地运行无效）
基本demo：
<!doctype html>
<h...
How to create the branch from specific commit in different branch
...owse the repository at this point in the history.
3- Click on the tree: xxxxxx in the upper left. Just type in a new branch name there click Create branch xxx as shown below.
Now you can fetch the changes from that branch locally and continue from there.
...
Difference between `constexpr` and `const`
...cx2(x, 1); // OK: runtime initialization
constexpr double xx = COMP.real(); // OK: compile-time initialization
constexpr double imaglval = COMP.imag(); // OK: compile-time initialization
complex cx3(2, 4.6); // OK: runtime initialization
Tips from the ...
What are the differences between git remote prune, git prune, git fetch --prune, etc
...po has a branch ("frotz") with the same name as a branch hierarchy ("frotz/xxx", a possible branch naming convention), git remote --prune was succeeding (in cleaning up the remote tracking branch from your repo), but git fetch --prune was failing.
Not anymore:
Change the way "fetch --prune" w...