英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

tuple    
元组

元组

tuple
有序n 元; n 重序元


tuple
n 倍; n 元组; n 元数; n 元向量


tuple
重元组

tuple


In {functional languages}, a data object containing two or
more components. Also known as a product type or pair,
triple, quad, etc. Tuples of different sizes have different
types, in contrast to lists where the type is independent of
the length. The components of a tuple may be of different
types whereas all elements of a list have the same type.
Examples of tuples in {Haskell} notation are (1,2),
("Tuple",True), (w,(x,y),z). The degenerate tuple with zero
components, written (), is known as the unit type since it has
only one possible value which is also written ().

The implementation of tuples in a language may be either
"{lifted}" or not. If tuples are lifted then (bottom,bottom)
/= bottom and the evaluation of a tuple may fail to terminate.
E.g. in Haskell:

f (x,y) = 1 --> f bottom = bottom
f (bottom,bottom) = 1

With lifted tuples, a tuple pattern is refutable. Thus in
Haskell, {pattern matching} on tuples is the same as pattern
matching on types with multiple constructors ({algebraic data
types}) - the expression being matched is evaluated as far as
the top level constructor, even though, in the case of tuples,
there is only one possible constructor for a given type.

If tuples are unlifted then (bottom, bottom) = bottom and
evaluation of a tuple will never fail to terminate though any
of the components may. E.g. in {Miranda}:

f (x,y) = 1 --> f bottom = 1
f (bottom,bottom) = 1

Thus in Miranda, any object whose type is compatible with a
tuple pattern is assumed to match at the top level without
evaluation - it is an {irrefutable} pattern. This also
applies to user defined data types with only one constructor.
In Haskell, patterns can be made irrefutable by adding a "~"
as in

f ~(x,y) = 1.

If tuple constructor functions were {strict} in all their
arguments then (bottom,x) = (x,bottom) = bottom for any x so
matching a refutable pattern would fail to terminate if any
component was bottom.


请选择你想看的字典辞典:
单词字典翻译
tuple查看 tuple 在百度字典中的解释百度英翻中〔查看〕
tuple查看 tuple 在Google字典中的解释Google英翻中〔查看〕
tuple查看 tuple 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Where do I pay my credit card bill? - Costco Customer Service
    Where do I pay my credit card bill? Costco Anywhere Visa® Card by Citi payments are made directly to Citi Here’s the contact information you’ll need Costco Anywhere Visa® Card by Citi: www citicards com Consumer cards: 1-855-378-6467 Business cards: 1-855-378-6468
  • My Costco Anywhere Visa® Card by Citi isn’t working, what do I do?
    My Costco Anywhere Visa® Card by Citi isn’t working, what do I do? If you have received your Costco Anywhere Visa® Card by Citi but are unable to use it for purchases, it’s possible that your Costco Anywhere Visa® Card by Citi card has not yet been activated To check, simply visit Citi here
  • Costco Customer Service
    Costco Logistics offers in-home delivery and installation services for many items sold on Costco com Check this information out for answers to frequently asked questions
  • What do I do if I have questions about my Costco Anywhere Visa® Card by . . .
    Welcome to the Costco Customer Service page Explore our many helpful self-service options and learn more about popular topics
  • How do I register on Costco. com?
    If you happen to have a Costco Anywhere Visa® Card by Citi, just look for your membership number on the back of the card, directly to the right of your picture
  • When will I receive my Costco Cash Rewards from Citi?
    Costco Cash Rewards from Citi are issued annually with your February credit card billing statement If you’ve opted for paperless statements, the reward will be sent via email You can also access it through the Citi mobile app or on Citi com Costco Cash Rewards from Citi expire on December 31 of the year they are distributed
  • Costco Customer Service
    Welcome to the Costco Customer Service page Explore our many helpful self-service options and learn more about popular topics
  • How can I reset my Costco. com password?
    If you’ve forgotten your password, please head first to the sign in page Select “Forgot Password?,” then enter your email address and then hit “Send Password Reset Link ” We’ll email you a reset link which will be good for 12 hours If you don’t see an email from us, be sure to check your spam folder On the sign-in page, select Forgot Password?, enter your email address, and
  • Digital Membership Card - General FAQs - Costco Customer Service
    Digital Membership Card - Payment FAQs WHAT IS THE DIGITAL MEMBERSHIP CARD? Through the Costco Mobile App, you can access a digital version of your membership card Costco’s app will also allow you to renew your membership and view your 2% reward balance on your phone Back to Top HOW DO I DOWNLOAD MY DIGITAL MEMBERSHIP CARD?
  • Digital Membership Card - Payment FAQs - Costco Customer Service
    You’ll only need to be connected to the internet when adding your Costco Anywhere Visa Card to your Digital Membership Card You don’t need an internet connection to view your Digital Membership Card or use it as payment at the register





中文字典-英文字典  2005-2009