大约有 40,000 项符合查询结果（耗时：0.0464秒） [XML]
How to echo with different colors in the Windows command line
I know that the color bf command sets the colors of the whole command line window but I wanted to to print one single line in a different color.
...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
...sionID.ToString();
userDic.AddOrUpdate(
authUser.UserId,
sessionId,
(key, oldValue) => sessionId);
I.e. the Func always returns the sessionId, so that both Add and Update set the same value.
BTW: there is a sample on the MSDN page.
...
Why can I initialize a List like an array in C#?
...dd(...) is called for each member of the initializer.
Thus, these two blocks are roughly identical:
List<int> a = new List<int> { 1, 2, 3 };
And
List<int> temp = new List<int>();
temp.Add(1);
temp.Add(2);
temp.Add(3);
List<int> a = temp;
You can call an alternate...
Replace values in list using Python [duplicate]
...
user2357112 supports Monica
200k2020 gold badges287287 silver badges373373 bronze badges
answered Oct 8 '09 at 19:58
John MillikinJo...
Animation CSS3: display + opacity
...his is the actual CSS code to use
.parent:hover .child
{
display: block;
-webkit-animation: fadeInFromNone 0.5s ease-out;
-moz-animation: fadeInFromNone 0.5s ease-out;
-o-animation: fadeInFromNone 0.5s ease-out;
animation: fadeInFromNone 0.5s ease-out;
}
@-webkit-keyframes fad...
Remove duplicate lines without sorting [duplicate]
...
The UNIX Bash Scripting blog suggests:
awk '!x[$0]++'
This command is telling awk which lines to print. The variable $0 holds the entire contents of a line and square brackets are array access. So, for each line of the file, the node of the array x is incremented ...
Format decimal for percentage values?
What I want is something like this:
5 Answers
5
...
How can I display just a portion of an image in HTML/CSS?
...
One way to do it is to set the image you want to display as a background in a container (td, div, span etc) and then adjust background-position to get the sprite you want.
share
|
improve...
The easiest way to transform collection to array?
...rtest in LoC in current context) way to transform it to Foo[] ? Any well-known libraries are allowed.
8 Answers
...
What exactly is nullptr?
...
How is it a keyword and an instance of a type?
This isn't surprising. Both true and false are keywords and as literals they have a type ( bool ). nullptr is a pointer literal of type std::nullptr_t, and it's a prvalue (you cannot take ...