JavaScript learning Note--3. System objects

1. Common Object Types

Time (date) object

Math Object

String Object

Regular expression (REGEXP) object

Arrays (Array) objects

2.Date Object ://var date= new Date ();

. GetYear ()//Acquisition Year 13

. getFullYear ()//Acquisition Year 2013

. GetMonth ()//Get month (requires + 1)

. GetDate ()//Acquisition Day

. GetHours ()//acquired

. getminutes ()//Get points

. getseconds ()//Get seconds

. GetDay ()//Get Week (obtained is 0~6, need to use array allocation)

3.Math Object ://Do not need new, direct use

Math.Abs (-200)//Get the absolute value of the number (200 absolute value is 200,-200 absolute value is also 200)

Math.ceil (12.35)//returns the smallest integer greater than or equal to the number (returns 13)

Math.floor (12.95)//returns the smallest integer less than or equal to the number (returns 12)

Math.Round (12.3/12.9)//rounded (return 12/13)

Math.random ()//random

4.String Object ://var str= "ABCdef"

. length//String lengths (this is a property)

. Split ()//split the string to form a string array

. Match ()//Match regular

. CharAt ()//returns the character at the specified index

. substr (1,4)//Returns a string of a specified range

. replace ()//Replace

. toUpperCase ()//turn into uppercase

. LASTINDEXOF ()//returns the location of the last occurrence of the specified character

5.RegExp Object ://var zz=/mode/mode modifier

Refer to the regular syntax for use with a string object

@zhnoah
Source: http://www.cnblogs.com/zhnoah/
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JavaScript learning Note--3. System objects