colon notation

Core tip: in a project, one time to use:: Selection pseudo element, and then the development classmate asked me, CSS in a colon and two colon god horse difference?In a project, once to use:: Selection pseudo element, and then the development

Web page Production WEBJX article introduction: in a project, once to use:: Selection pseudo element, and then the development classmate asked me, CSS in a colon and two colon god horse difference? In a project, once to use:: Selection

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

Alternative syntax in PHP (colon, endif, Endwhile, ENDfor) We often see a lot of strange php syntax in a wordpress-like blog program template, such as: Empty of For a considerable part of the PHP enthusiasts have never seen, what are these things?

We often see a lot of strange php syntax in a wordpress-like blog program template, such as: The Empty For a considerable part of the PHP enthusiasts have never seen, what are these things? Is it the blogging developer's own template

We often see a lot of strange php syntax in the wordpress template of a blog program, such as: Copy CodeThe code is as follows: The empty For a lot of PHP enthusiasts have never seen Ah, what are these things? Are those blog developers

What does a colon in a MySQL statement mean? Reply to discussion (solution) $db->bandvars (); Passing valuesecho $check _query; Will know. Can look at the brochure PDO class Prepare (' SELECT name, colour, calories from fruit

Just transferred from the Mysql/mssql database to Oracle, the update was unsuccessful when called in C #, and was later found to be a problem with incorrect format of the pass parameter.The command in Oracle is preceded by a colon: callout in front

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  JSON(JavaScript Object Notation) is a lightweight data exchange format. Easy to read and write. It is also easy to parse and generate machines. It is based on a subset of JavaScript programming language, standard ECMA-262 3rd edition-December 199