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5. Reference type and value type as function parameters?

2022-07-24 18:21:00 【yingxingyf】

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		
	</head>
	<body>
	
		<input type="button" value="  test  " onclick ="testf()" />
	
	</body>
</html>
<script type="text/javascript">
/*
function testf(){
    
	var m = 20;
	var n = 30;
	var t = max(m,n);
	console.log(t);
}


//1、 Value type as parameter of function ： Value passed .
function max(x,y){
    
	var m;
	if(x>y){
    
		m = x;
	}else{
    
		m = y;
	}
	return m;
}
*/

function testf(){
    
	var ages = [28,10,19,25,21,38,8];
	bubble(ages);
	
	for(var i in ages){
    
		document.write(ages[i]+",");
	}	
}

//2、 Reference types as arguments to functions , It's address delivery （ The address saved in the argument was passed to the formal parameter , That is, the arguments and formal parameters point to the same memory area ）
// Bubble sort 
// Parameters ： Array （ A disorderly ）
// Return value ： Array （ In order ）
function bubble(arr){
    	
	for(var i=0;i<arr.length-1;i++){
    
		for(var j=0;j<arr.length-1-i;j++){
    
			if(arr[j]>arr[j+1]){
    
				var temp = arr[j];
				arr[j] = arr[j+1];
				arr[j+1] =temp;
			}
		}
	}
	return arr;
}

function bubble2(arr){
    	
	var arrnew = [];// A new address has been opened in the pile 
	
	for(var i=0;i<arr.length-1;i++){
    
		for(var j=0;j<arr.length-1-i;j++){
    
			if(arr[j]>arr[j+1]){
    
				var temp = arr[j];
				arr[j] = arr[j+1];
				arr[j+1] =temp;
			}
		}
	}
	return arr;
}
</script>