unique item list

Chapter 3 list introduction, chapter 3 list Introduction The list is a very important part. In Python, the list, Dictionary, function, class, and class are mainly composed of functions with various functions, as long as you understand the list,

Concept:A primary key (primary key) uniquely identifies a property or group of properties for a row in a table. A table can have only one primary key, but there may be multiple candidate indexes. Primary keys often form referential integrity

In the document management system of the moss2007 era, a unique identifier (unique identifier) is required to effectively manage our documents. However, such a unique number was not provided at the time, and many users or developers had to find

I. Unique function The class attribute algorithm has the unique function of "delete" all adjacent repeating elements from the input sequence. The algorithm deletes the adjacent repeating elements, then rearranges the elements within the input range,

Transferred from: http://blog.csdn.net/duck_arrow/article/details/8264686Concept:A primary key (primary key) uniquely identifies a property or group of properties for a row in a table. A table can have only one primary key, but there may be multiple

In the default ribbon of SharePoint document list, there is such a send email button, through which you can share the selected document to other users, such:   However, in the sent email, the default email button uses the URL address of the

Q: Why should I introduce the concept of a linked list? What is it that solves the problem?A: the array as a data storage structure has a certain flaw, in the unordered array, the search is inefficient, and in an ordered array, the insertion

Is the child item the same as the parent item? $ Term_id $ child? In the get_term_children function: The sub-item and parent item will be the same item ??? $ Term_id = $ child ??? The following is the source code, which has been confusing for a long

Refreshing: select an item in the drop-down box. the code that automatically appears next to this item is as follows: & lt ;? If & nbsp; ($ mark = 2) {$ SQL = & quot; select & nbsp; dwmc, id & nbsp; from & nbsp; s: select an item in the drop-down

This article is the first article in the IOS7 series, which mainly introduces the use of keychain to save and get app data, to solve the problem of iOS7 to get the same udid. and give a tool to get udid, easy to use, only need to replace two