JavaScript中数组的合并以及排序实现示例
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2022-07-01 14:00:47
合并两个数组 - concat()
源代码:
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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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