大约有 40,700 项符合查询结果（耗时：0.0538秒） [XML]
Meaning of $? (dollar question mark) in shell scripts
...
This is the exit status of the last executed command.
For example the command true always returns a status of 0 and false always returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (aces...
What are the recommendations for html tag?
...sed for and what the implications are and finally outweigh the advantages/disadvantages.
The <base> tag mainly eases creating relative links in templating languages as you don't need to worry about the current context in every link.
You can do for example
<base href="${host}/${context}...
Exit codes in Python
I got a message saying script xyz.py returned exit code 0 . What does this mean?
13 Answers
...
JSON.NET Error Self referencing loop detected for type
...
Fix 1: Ignoring circular reference globally
(I have chosen/tried this one, as have many others)
The json.net serializer has an option to ignore circular references. Put the following code in WebApiConfig.cs file:
config.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling
= Ne...
Why use non-member begin and end functions in C++11?
...
share
|
improve this answer
|
follow
|
edited Sep 30 '11 at 23:06
chown
47.6k1616 gold ba...
Convert interface{} to int
...erenced specs parts:
Conversions are expressions of the form T(x) where T is a type and x is an expression that can be converted to type T.
...
A non-constant value x can be converted to type T in any of these cases:
x is assignable to T.
x's type and T have identical underlying types.
x's type ...
Getting all types that implement an interface
...
Mine would be this in c# 3.0 :)
var type = typeof(IMyInterface);
var types = AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(s => s.GetTypes())
.Where(p => type.IsAssignableFrom(p));
Basically, the least amount of iterat...
MySQL Error 1093 - Can't specify target table for update in FROM clause
...
Update: This answer covers the general error classification. For a more specific answer about how to best handle the OP's exact query, please see other answers to this question
In MySQL, you can't modify the same table which you use i...
Can you use a trailing comma in a JSON object?
...e comma before the actual value, so you end up with code that looks like this:
s.append("[");
for (i = 0; i < 5; ++i) {
if (i) s.append(","); // add the comma only if this isn't the first entry
s.appendF("\"%d\"", i);
}
s.append("]");
That extra one line of code in your for loop is hardly ...
How to make a div 100% height of the browser window
...containing block. When the height or width of the initial containing block is changed, they are scaled accordingly.
These units are vh (viewport height), vw (viewport width), vmin (viewport minimum length) and vmax (viewport maximum length).
How can this be used to make a divider fill the height ...