急急急!!!!!_百度知道C#程序错了，怎么搞啊？_百度知道Mobile Apps
Engineering, R&D
Web & Software
Finance, Statistics & Business Analysis
Need Help?
Premium Support
Work with Us
Initiatives
BUILT-IN WOLFRAM LANGUAGE SYMBOL
[list,crit]picks out all elements ei of list for which crit[ei] is .
[list,crit,n]picks out the first n elements for which crit[ei] is .
[crit]represents an operator form of
that can be applied to an expression.
The object list can have any head, not necessarily .
When used on an ,
picks out elements according to their values.
can be used on
[crit][list] is equivalent to [list,crit].
Select elements that are even:
Use a pure function to test each element:
Return only the first expression selected:
Use the operator form of :
operates on values in an :
             
Introduced in 1988 (1.0) | Updated in 2014 (10.0)
Please complete this field.
Name (optional)
Email address (optional)
Send Feedback
For Customers
Public Resources
Enable JavaScript to interact with content and submit forms on Wolfram websites.帮我看下这段VB计算器的代码的意思_百度知道