大约有 40,700 项符合查询结果（耗时：0.0669秒） [XML]
The specified named connection is either not found in the configuration, not intended to be used wit
...y framework object and when I add it to my project, the connectionstring
is added to app.config in the connectionstring section, but when I want to create new entitycontext and use this connectionstring , this error appears
...
MIN and MAX in C
...
Where are MIN and MAX defined in C, if at all?
They aren't.
What is the best way to implement these, as generically and type safe as possible (compiler extensions/builtins for mainstream compilers preferred).
As functions. I wouldn't use macros like #define MIN(X, Y) (((X) < (Y)) ? (X...
Which characters are valid in CSS class names/selectors?
...followed by any number of hyphens, underscores, letters, or numbers. There is a catch: if the first character is a hyphen, the second character must2 be a letter or underscore, and the name must be at least 2 characters long.
-?[_a-zA-Z]+[_a-zA-Z0-9-]*
In short, the previous rule translates to t...
simulate background-size:cover on or
...
This is something I pulled my hair out over for a while, but I came across a great solution that doesn't use any script, and can achieve a perfect cover simulation on video with 5 lines of CSS (9 if you count selectors and brac...
How to len(generator()) [duplicate]
...erators are very useful. They have advantages over functions that return lists. However, you could len(list_returning_function()) . Is there a way to len(generator_function()) ?
...
How to make an ImageView with rounded corners?
In Android, an ImageView is a rectangle by default. How can I make it a rounded rectangle (clip off all 4 corners of my Bitmap to be rounded rectangles) in the ImageView?
...
Transitions on the CSS display property
...
You can concatenate two transitions or more, and visibility is what comes handy this time.
div {
border: 1px solid #eee;
}
div > ul {
visibility: hidden;
opacity: 0;
transition: visibility 0s, opacity 0.5s linear;
}
div:hover > ul {
visibility: ...
Why does an SSH remote command get fewer environment variables then when run manually? [closed]
...
There are different types of shells. The SSH command execution shell is a non-interactive shell, whereas your normal shell is either a login shell or an interactive shell. Description follows, from man bash:
A login shell is one whose first character of argument
zero is a -...
How can I output leading zeros in Ruby?
...
If the maximum number of digits in the counter is known (e.g., n = 3 for counters 1..876), you can do
str = "file_" + i.to_s.rjust(n, "0")
share
|
improve this answer
...
How to check if a value exists in an array in Ruby
...
share
|
improve this answer
|
follow
|
edited Apr 29 '16 at 12:02
Arslan Ali
15.7k77 gold...