大约有 46,000 项符合查询结果（耗时：0.0441秒） [XML]
RuntimeWarning: invalid value encountered in divide
I have to make a program using Euler's method for the "ball in a spring" model
4 Answers
...
Adjust UILabel height to text
I have some labels which I want to adjust their height to the text, this is the code I wrote for this now
17 Answers
...
Java regex capturing groups indexes
I have the following line,
3 Answers
3
...
CSS Box Shadow - Top and Bottom Only [duplicate]
I cannot find any examples of how to do this, but how can I add a box shadow only to the top and bottom of an element?
5 An...
How to configure PostgreSQL to accept all incoming connections
I've got a PostgreSQL data base that I'd like to configure to accept all incoming connections regardless of the source IP address. How can this be configured in the pg_hba.conf file? I'm using postgreSQL version 8.4.
...
Why is using “for…in” for array iteration a bad idea?
I've been told not to use for...in with arrays in JavaScript. Why not?
27 Answers
27...
How to count the number of true elements in a NumPy bool array
I have a NumPy array 'boolarr' of boolean type. I want to count the number of elements whose values are True . Is there a NumPy or Python routine dedicated for this task? Or, do I need to iterate over the elements in my script?
...
C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
Yesterday I was giving a talk about the new C# "async" feature, in particular delving into what the generated code looked like, and the GetAwaiter() / BeginAwait() / EndAwait() calls.
...
How to track down a “double free or corruption” error
When I run my (C++) program it crashes with this error.
8 Answers
8
...
php is null or empty?
I have a question regarding NULL in PHP:
9 Answers
9
...