大约有 7,000 项符合查询结果（耗时：0.0208秒） [XML]
When is it better to use an NSSet over an NSArray?
...
When the order of the items in the collection is not important, sets offer better performance for finding items in the collection.
The reason is that a set uses hash values to find items (like a dictionary) while an array has to iterate over its entire contents to f...
What are the best Haskell libraries to operationalize a program? [closed]
If I'm going to put a program into production, there are several things I need that program to do in order to consider it "operationalized" – that is, running and maintainable in a measurable and verifiable way by both engineers and operations staff. For my purposes, an operationalized program mus...
How to do a logical OR operation in shell scripting
...
From Bash Reference Manual → 3.4.2 Special Parameters
#
($#) Expands to the number of positional parameters in decimal.
Therefore, $# will always be either 0 or a bigger integer.
So if you want to do something whenever $# is either 0 or bigger than 1, you jus...
get dictionary value by key
...s true or false based on whether the key is found or not, and sets its out parameter to the corresponding value if the key is there.
If you want to check if the key is there or not and do something when it's missing, you need something like this:
bool hasValue = Data_Array.TryGetValue("XML_File", ...
#ifdef #ifndef in Java
I doubt if there is a way to make compile-time conditions in Java like #ifdef #ifndef in C++.
8 Answers
...
How do I run a spring boot executable jar in a Production environment?
...rtifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
For Gradle add the following snippet to your build.gradle:
springBoot {
executable = true
}
The fully executable ja...
No identities were available - administrator request
...
Visit Member Center
Go to "iOS Provisioning Portal" -> "Certificates" (Left sidebar) >> "Distribution" tab
Check field "Provisioning Profiles". If empty, next (4)
Go to "Provisioning" (Left sidebar) -> "Distribution" tab. Press "New Profile...
What's the difference between “ ” and “ ”?
...ce, which is used when you don't want an automatic line break at that position. The regular space has the character code 32, while the non-breaking space has the character code 160.
For example when you display numbers with space as thousands separator: 1 234 567, then you use non-breaking spaces s...
What's the right way to pass form element state to sibling/parent elements?
I've come up with two solutions, but neither of them feels quite right.
10 Answers
10
...
How to get base url with jquery or javascript?
...e, pathname gives you the path segment of the url, href contains the query params as well
– dschulten
Jul 8 '17 at 12:27
add a comment
|
...