大约有 11,000 项符合查询结果（耗时：0.0266秒） [XML]
How to declare an array in Python?
...
variable = []
Now variable refers to an empty list*.
Of course this is an assignment, not a declaration. There's no way to say in Python "this variable should never refer to anything other than a list", since Python is dynamically typed.
*The default...
LINQ Aggregate algorithm explained
This might sound lame, but I have not been able to find a really good explanation of Aggregate .
12 Answers
...
How to upgrade all Python packages with pip?
...
There isn't a built-in flag yet, but you can use
pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U
Note: there are infinite potential variations for this. I'm trying to keep this answer short and si...
Is an HTTPS query string secure?
I am creating a secure web based API that uses HTTPS; however, if I allow the users to configure it (include sending password) using a query string will this also be secure or should I force it to be done via a POST?
...
How to configure postgresql for the first time?
I have just installed postgresql and I specified password x during installation.
When I try to do createdb and specify any password I get the message:
...
Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed
I have a fragment interface with tabs along the bottom which open different fragments in the main view.
13 Answers
...
Simple argparse example wanted: 1 argument, 3 results
The documentation for the argparse python module , while excellent I'm sure, is too much for my tiny beginner brain to grasp right now. I don't need to do math on the command line or meddle with formatting lines on the screen or change option characters. All I want to do is "If arg is A, do this...
What is ng-transclude?
I have seen a number of questions on StackOverflow discussing ng-transclude, but none explaining in layman's terms what it is.
...
What is the maximum recursion depth in Python, and how to increase it?
I have this tail recursive function here:
17 Answers
17
...
Handling JSON Post Request in Go
So I have the following, which seems incredibly hacky, and I've been thinking to myself that Go has better designed libraries than this, but I can't find an example of Go handling a POST request of JSON data. They are all form POSTs.
...