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Detailed explanation of merging and sorting examples of arrays in JavaScript

怪我咯Original: 2017-07-07 15:05:511017browse

This article mainly introduces examples of merging and sorting arrays in JavaScript. It is the basic knowledge for introductory learning of JavaScript. Friends who need it can refer to it

Merge two arrays-concat()
Source code:

<!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>

Test results:

Cecilie,Lone,Emil,Tobias,Linus

Merge three arrays-concat()
Source code:

<!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>

Test result:

Jani,Tove,Stale,Kai Jim,Borge,Cecilie,Lone

Array sorting (Ascending alphabetical order) - sort()
Source code:

<!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>

Test result:

Apple,Banana,Mango,Orange

Number sorting (ascending numerical order) - sort()
Source code:

<!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>

Test result:

1,5,10,25,40,100

Number sorting (descending numerical order) - sort()
Source code:

<!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>

Test result:

100,40,25,10,5,1

Reverse the order of elements in an array - reverse()
Source code:

<!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>

Test result:

Mango,Apple,Orange,Banana

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