unique file names

BrieflyThe Qtemporaryfile class is an I/O device that operates temporary files.Qtemporaryfile is used to securely create a unique temporary file. The temporary file is created by calling Open (), and the name is unique (that is, guaranteed not to

Use the PHPuniqid function to generate a unique ID. The PHPuniqid function is used to generate a unique ID. it is common to use phpuniqid to generate a unique id, such as the temporary cache file name, temporary variables, temporary security code,

Original: http://www.cnblogs.com/xdp-gacl/p/4264425.htmlIn peacetime development, the property names of the field names and tables in our table are not necessarily identical, and the following shows how to resolve conflicts where field names differ

The use cases for generating unique IDs are very common, such as temporary cache file names, temporary variables, and temporary security codes. the uniqid () function is based on the current time in microseconds, generate a unique ID. Because the

The use cases for generating unique IDs are very common, such as temporary cache file names, temporary variables, and temporary security codes. The uniqid () function is based on the current time in microseconds, generate a unique ID. Because the

In peacetime development, the field names in our table and the table corresponding entity class property names are not necessarily exactly the same, if you directly in the XML mapping file using SQL to map, will cause the return value is empty, the

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

Scenarios that generate unique IDs are very common, such as temporary cache file names, temporary variables, temporary security codes, and so on, and the uniqid () function generates a unique ID based on the current time in microseconds. Because the

A. Guid conceptGUID: The globally unique Identifier (globally unique identifier) is also known as the UUID (universally unique Identifier). A GUID is a 128-bit numeric identifier produced by a particular algorithm that indicates the uniqueness of

Get all the filenames under the folder is a common feature, today once again have this demand, all on the internet to find a lot, and write down for later use.Original: http://blog.csdn.NET/cxf7394373/article/details/7195661Original: