如何在JavaScript中进行数组的合并以及排序？
合并两个数组 - concat()
源代码:
<!DOCTYPE html>
<html>
<body>
<p id="demo">点击按钮合并数组。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction()
{
var hege = ["Cecilie", "Lone"];
var stale = ["Emil", "Tobias", "Linus"];
var children = hege.concat(stale);
var x=document.getElementById("demo");
x.innerHTML=children;
}
</script>
</body>
</html>
测试结果:
Cecilie,Lone,Emil,Tobias,Linus
合并三个数组 - concat()
源代码:
<!DOCTYPE html> <html> <body> <script> var parents = ["Jani", "Tove"]; var brothers = ["Stale", "Kai Jim", "Borge"]; var children = ["Cecilie", "Lone"]; var family = parents.concat(brothers, children); document.write(family); </script> </body> </html>
测试结果:
Jani,Tove,Stale,Kai Jim,Borge,Cecilie,Lone
数组排序（按字母顺序升序）- sort()
源代码:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to sort the array.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort();
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>
</body>
</html>
测试结果:
Apple,Banana,Mango,Orange
数字排序（按数字顺序升序）- sort()
源代码:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to sort the array.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var points = [40,100,1,5,25,10];
points.sort(function(a,b){return a-b});
var x=document.getElementById("demo");
x.innerHTML=points;
}
</script>
</body>
</html>
测试结果:
1,5,10,25,40,100
数字排序（按数字顺序降序）- sort()
源代码:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to sort the array.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var points = [40,100,1,5,25,10];
points.sort(function(a,b){return b-a});
var x=document.getElementById("demo");
x.innerHTML=points;
}
</script>
</body>
</html>
测试结果:
100,40,25,10,5,1
将一个数组中的元素的顺序反转排序 - reverse()
源代码:
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to reverse the order of the elements in the array.</p>
<button onclick="myFunction()">Try it</button>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
function myFunction()
{
fruits.reverse();
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>
</body>
</html>
测试结果:
Mango,Apple,Orange,Banana
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