1, concat method
[Action] combines multiple arrays, and this method does not change the existing array, it only returns a copy of the associative array.
[Syntax] Arrayobj.concat (array1,array2,...)
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2"); var array2 = new Array ("3", "4"); var array3 = Array1.concat (array2); document.write (array3+ ""); document.write (Array3[0]); </script>
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2, Join method,
[Effect] Converts an existing array object to 1 strings, which can be concatenated with the specified delimiter.
[Syntax] Arrayobj.join (separator), separator is a separator, and defaults to ",".
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2"); document.write (Array1.join ()); </script>
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3, Pop, shift method
The action Pop method deletes and returns the last element in the array, while the length of the array changes. The opposite is the shift () method, which deletes and returns the first element of the array.
[Syntax] Arrayobj.pop|shift ()
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2", "3", "4"); document.write (Array1.pop () + "<br>"); document.write (array1.length+ "<br>"); document.write (Array1.shift () + "<br>"); document.write (array1.length); </script>
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4, Push, Unshift method
Action adds one or more elements to the end of the array and returns a new length. At the same time, the length of the array will be changed, corresponding to the Unshift method. Note that the return value of the method is not the new array, but the length of the new array.
[Syntax] Arrayobj.push|unshift (Ele1,ele2,ele3,...)
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2", "3", "4"); var newl = Array1.push ("5", "6"); document.write (newl+ "<br>"); document.write (array1); </script>
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5, Reverse method
[Action] Reverses the order of elements in the array.
[Syntax] Arrayobj.reverse ()
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2", "3", "4"); document.write (Array1.reverse ()); </script>
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6, Slice method
function to return the elements of a selection in an existing array.
[Syntax] Arrayobj.slice (startposition,endposition), the first argument is required, the second is optional, if not write, the default is from StartPosition to the last element. Note that the element containing the startposition is included, not the endposition.
Instance
<script type= "Text/javascript" > var array1 = new Array ("1", "2", "3", "4"); document.write (Array1.slice (0,2)); </script>
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7. Sort method
Action is used to sort the array elements.
[Syntax] Arrayobj.sort (Sortrule ()). parameter is optional, representing the method of sorting. Specifically, sort sort has several basic principles, first, by default alphabetical order; second, uppercase letters precede lowercase letters. Base with this, for numeric sorting, you need to write your own sorting method.
Instance
<script type= "Text/javascript" > var array1 = new Array ("C", "a", "D", "B"); var array2 = new Array ("C", "a", "D", "B"); var array3 = new Array ("2", "3", "1") function Sortrule (a,b) {return a-b; } document.write (Array1.sort () + "<br>"); document.write (Array2.sort () + "<br>"); document.write (Array3.sort (sortrule)); </script>
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8, Splice method
[Action] Deletes the array and joins the new element.
[Syntax] Arrayobj.splice (Index,number,ele1,ele2 ...). Index is an indexed position and must be a number representing the location from which to insert or delete the element. Number that represents the count of elements removed from the index position, or "0", which means inserting a new element at index, and not deleting the later array elements. (speak too mixed ~ ~ ~ To see the code example)
Instance
<script type= "Text/javascript" > var array1 = new Array ("C", "a", "D", "B"); Array1.splice (0,0, "M") document.write (array1+ "<br>"); Array1.splice (0,2, "n") document.write (array1); </script>
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9, tostring Method
A method that uses very high rates to convert an array type object directly to a string-type object.
[Syntax] arrayobj.tostring ()
Instance
<script type= "Text/javascript" > var array1 = new Array ("C", "a", "D", "B"); Strobj = Array1.tostring (); document.write (strobj+ "<br>"); </script>
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Note: The new string is connected by the original array, but the middle has a "," delimited, if you want to remove "," You can write this:
<script type= "Text/javascript" > var array1 = new Array ("C", "a", "D", "B"); Strobj = array1.tostring (). Replace (/,/g, ""); document.write (strobj.replace+ "<br>"); </script>
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