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String (immutable type) List (mutable type) Tuples (immutable types) Dictionary (mutable type) Collection (mutable type) Characteristics Similar to list, with subscript index, which is an iterative object

Today, a variety of tools and plug-ins are already as much as the stars, and often the best and most useful tools are charged. To this end, we specialize in sorting out these free quality Photoshop plug-ins, hoping to be helpful to web designers and

IntroducedSet: A collection, which is a collection that does not contain duplicate data. (A collection that contains no duplicate elements. ）The set contains a maximum of one null element, the no contains two identical elements, and does not conform

CSS (cascading style sheets cascading style Sheet)-------presentation layerThe latest version of CSS3.0, a computer language capable of separating performance from content, mainly learns selectors and attributes in CSSTake a look at the writing

XPath is a language used to search for information in XML documents. The following describes how to parse xml using xpath and dom4j in java. for details, refer to the following four methods for parsing XML files. There are four classic methods to

1. Selector:A) a > B elements that match B as a sub-elementb) A + B is the element that matches the B of the immediate sibling element behindc) A ~ b is an element that matches the B of a later sibling2. Positioning between elements:A): Even the

1 Analysis of XML files in 4 ways There are usually four classical methods for parsing XML files. There are two basic parsing methods, one called Sax and the other called Dom. Sax is based on parsing of event streams, and Dom is based on XML

CSS selector summary, css Selector Selector priority instanceID picker 100Class selector 10Pseudo-class selector 10: link: visited: focus: hover: actived: langThe UI element status pseudo Class E: enabled {} matches the available eElements in all

The previous picture: about the Collection interfaceFirst, collection in the common functions:Boolean Add (Object e): Adding elements to the collectionvoid Clear (): empties all elements in the collectionBoolean contains (Object O): Determines

1.CSS (cascading style sheets)2.CSS syntaxselector {Property name 1: attribute value 1;Property Name 2: attribute value 2;}3. Three-way reference to CSSFirst type: inline styleExample: Internal Styles Second type: internal styleIn the Head tab,