javascript date objects array objects two dimensional array instructions

2020-05-09 18:06:09
OfStack

1. Date object

Format: date object name =new Date([date parameter])
Date parameter: 1. Ellipsis (most commonly used)
2.

:today=new Date(" October 1,2008 12:00:00 ");

3. Numerical format: month, day, AD,[hour, minute, second]

today=new Date(2008,10,1);



<html> 

<head> 

<script type="text/javascript"> 

var date=new Date();

var day=date.getDay();

if(day==0){ 

    day=" day "; 

}

document.write(" Now time : "+(date.getYear()+1900)+" years "+(date.getMonth()+1)+" month "+date.getDate()+" day "+"  week "+day+" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds());

</script> 

</head> 

</html>

2. Array objects

Create array object:
format 1: array object name =new Array([number of elements])

format 3: array object name =[element 1[, element 2...]]

The array length is variable, and the array element type can be different

fruit=new Array(3); / / fruit = new Array ();

fruit[0]= "apple";

fruit [1] = "pear";

fruit [2] = "orange";

fruit=[" apple ", "pear", "orange"]; // most used



<html> 

<head> 

<script type="text/javascript"> 

//var fruits= new Array(" apple "," pears "," The oranges ");// More often  

//var fruits= [" apple "," pears "," The oranges "];// It is recommended to define and initialize the array as this , That's the way it's used the most 
var fruits=new Array(4);// With less  

fruits[0]=" apple "; 

fruits[1]=" pears "; 

fruits[2]=" The oranges "; 

fruits[3]=" banana "; 

for(var i=0;i<fruits.length;i++){ 

    document.writeln("fruit["+i+"]="+fruits[i]+"<br>"); 

} 

</script> 

</head> 

</html>

3. 2 dimensional array



<html> 

<head> 

<script type="text/javascript"> 

var fruits=new Array(3); 

fruits[0]=new Array(" apple ",2); 

fruits[1]=new Array(" pears ",3); 

fruits[2]=new Array(" peach ",4);
for(var i=0;i<fruits.length;i++){ 

    for(var j=0;j<fruits[i].length;j++){ 

        document.writeln("fruits["+i+"]["+j+"]="+fruits[i][j]+"</br>"); 

    } 

    document.writeln("</br>"); 

} 

</script> 

</head> 

</html>