two colons

The periods (.), colons (:), and double colons (: :) operators in c ++1. colon (:) usage (1) represents the definition of the intra-organization bit domain (that is, the variable occupies several bit spaces)Typedef struct _ XXX {Unsigned char a:

1. Colon (:) usage(1) Represents the definition of a bit field within a mechanism (that is, the variable occupies several bit spaces)typedef struct _xxx{unsigned char a:4;unsigned char c;} ; Xxx(2) The colon at the back of the constructor functions

in peacetime work with the pseudo-class selector when a colon and two colon seems to be possible, so what is the difference between the two, we first look at the world of the CSS3 selector in the specification of a description:A Pseudo-element is

A single colon (:) used for CSS3 pseudo-classes, double colons (::) for CSS3 pseudo-elements. A pseudo-element consists of a double colon and a pseudo-element name. Double colons are introduced in the CSS3 specification to differentiate between

A single colon (:) used for CSS3 pseudo-classes, double colons (::) for CSS3 pseudo-elements.A pseudo-element consists of a double colon and a pseudo-element name. Double colons are introduced in the CSS3 specification to differentiate between

In PostgreSQL, a double colon (::) is a type conversion, whereas in Hibernate, the colon in SQL is named parameters for matching named parameters in sql, when the normal SQL itself includes double colons in the PostgreSQL database environment.

While some information is stored, it does not need to occupy a full byte, only a few or one bits. For example, when storing a switching volume, there are only 0 and 12 states, with one binary. In order to save storage space and make processing

questions raisedFor an input box, if the ID contains a colon (:), the selector needs to have a special wording,For example, the ID is lower Use $ (selector) to use the #id value directly, no DOM found Console.log ("#a:

Double Colon in PHP:: Usage A few days ago in Baidu know inside see someone asked PHP double colon:: The use, at that time to his answer is relatively concise because the phone typing is not convenient! It suddenly comes to mind today, so here's a

Excerpt from: http://blog.csdn.net/zimingjushi/article/details/6549390(1) Represents the definition of a bit field within a mechanism (that is, the variable occupies several bit spaces)typedef struct _xxx{unsigned char a:4;unsigned char c;} ; Xxx(2)