preorder

[计] 先根次序

发音

UK /pɹiːˈɔːdə/
CA /pɹiˈɔɹdɚ/
US /pɹiˈɔɹdɚ/
CA /pɹiˈɔɹɾɚ/
US /pɹiˈɔɹɾɚ/
AU /pɹiːˈoːdə/
NZ /pɹiːˈoːdə/

词形变化

preorders 复数 preorders preordered preordering preorders 三单 preordering 现在分词 preordered 过去式 preordered 过去分词

别名

pre-order

释义与例句

n.
  1. 1.

    An order for goods or services placed in advance.

  2. 2.

    A binary relation that is reflexive and transitive.

    数学

    The relation of logical implication over sentences is an example of a preorder.

    2000, Jean-Charles Pomerol, Sergio Barba-Romero, Multicriterion Decision in Management: Principles and Practice, Springer, Softcover, page 58, It can easily be verified that the above relation is a preorder, i.e. that it is reflexive and transitive.

v.
  1. 1.

    To order (goods or services) in advance, before they are available.

    及物
  2. 2.

    To sort or arrange beforehand.

    及物
adj.
  1. 1.

    Such that, recursively, the root is visited before the left and right subtrees.

    计算机 工程 数学

    2011, Ananda Rao Akepogu, Radhika Raju Palagiri, Data Structures and Algorithms Using C++, Pearson Education India, page 9.16, The preorder traversal visits a node first after which it traverses its left subtree and then traverses its right subtree.

词源

From pre- + order.

来源：wiktionary