|
|
|
Initialise
|
Fixed contents
|
n/a
|
a=[1,2,3,4,5];
|
1 2 3 4 5
|
Insert
|
Prepend element 'e'
|
a=[2,3,4]
e=1;
|
a.unshift(e);
|
1 2 3 4
|
|
Append element 'e'
|
a=[1,2,3]
e=4;
|
a.push(e);
|
1 2 3 4
|
|
Insert element 'e' at index 'n'
|
a=[1,2,3,4,5]
e=666
n=3
|
a.splice(n,0,e);
|
1 2 3 666 4 5
|
|
Prepend array 'b'
|
a=[1,2,3,4,5]
b=[10,20,30]
|
a=b.concat(a);
|
10 20 30 1 2 3 4 5
|
|
Append array 'b'
|
a=[1,2,3,4,5]
b=[10,20,30]
|
a=a.concat(b);
|
1 2 3 4 5 10 20 30
|
|
Insert array 'b' at index 'n'
|
a=[1,2,3,4,5]
b=[10,20,30]
n=3;
|
for (i=0; i<b.length; i++) { a.splice(n+i,0,b[i]) }
|
1 2 3 10 20 30 4 5
|
|
Concatenate array 'a' and array 'b'
|
a=[1,2,3]
b=[4,5,6]
|
c=a.concat(b);
|
1 2 3 4 5 6
|
|
Insert element 'e' at indices in 'b'
|
a=[1,2,3,4,5]
b=[0,2,4]
e=666
|
for (i=0; i<b.length; i++) { a.splice(b[i]+i,0,e) }
|
666 1 2 666 3 4 666 5
|
|
Insert element 'e' 'n' times at index 'm'
|
a=[1,2,3]
n=3
m=1
e=666
|
for (i=0; i<n; i++) { a.splice(m,0,e) }
|
1 666 666 666 2 3
|
Overwrite
|
Overwrite first element
|
a=[1,2,3]
|
a[0]=666;
|
666 2 3
|
|
Overwrite last element
|
a=[1,2,3]
|
a[a.length-1]=666;
|
1 2 666
|
|
Overwrite element at index 'n'
|
a=[1,2,3]
n=1
|
a[n]=666;
|
1 666 3
|
|
Overwrite elements from index 'n' (inclusive)
|
a=[1,2,3,4,5,6]
b=[7,8,9]
n=2
|
for (i=0; i<b.length; i++) { a.splice(n+i,1,b[i]) }
|
1 2 7 8 9 6
|
Count
|
Length of array
|
a=[1,2,3]
|
n=a.length;
|
3
|
Retrieve by index
|
Retrieve first element
|
a=[1,2,3]
|
e=a[0];
|
1
|
|
Retrieve last element
|
a=[1,2,3]
|
e=a[a.length-1];
|
3
|
|
Retrieve element 'n'
|
a=[1,2,3]
n=2
|
e=a[n];
|
3
|
Remove by index
|
Remove element at index 'n'
|
a=[1,2,3,4,5]
n=2;
|
a.splice(n,1);
|
1 2 4 5
|
|
Remove elements in index range 'm' to 'n' (inclusive)
|
a=[1,2,3,4,5]
m=1;
n=3;
|
a.splice(m,n-m+1);
|
1 5
|
|
Remove elements from index 'n' onwards (inclusive)
|
a=[1,2,3,4,5]
n=3;
|
a .splice(n,a.length-n+1);
|
1 2 3
|
Slice
|
Slice from index 'm' to 'n' (inclusive)
|
a=[1,2,3,4,5]
m=1
n=3
|
a=a.slice(m,n+1);
|
2 3 4
|
|
Slice from index 'n' onwards (inclusive)
|
a=[1,2,3,4,5]
n=2
|
a=a.slice(n);
|
3 4 5
|
|
Slice up to index 'n' (inclusive)
|
a=[1,2,3,4,5]
n=3;
|
a=a.slice(0,n+1);
|
1 2 3 4
|
|
Slice up to 'n' elements from end
|
a=[1,2,3,4,5]
n=2
|
a=a.slice(0,-n);
|
1 2 3
|
Sort
|
Sort in ascending order
|
a=[5,1,4,3,2]
|
a.sort();
|
1 2 3 4 5
|
|
Sort in descending order
|
a=[5,1,4,3,2]
|
a.sort(reverse_sort);
|
5 4 3 2 1
|
|
Reverse
|
a=[1,2,3,4,5]
|
a.reverse();
|
5 4 3 2 1
|
Use as a stack
|
Push element 'e'
|
a=[1,2,3,4,5]
e=666;
|
a.push(e);
|
1 2 3 4 5 666
|
|
Pop next element
|
a=[1,2,3,4,5]
|
a.pop();
|
1 2 3 4
|
|
Retrieve next element
|
a=[1,2,3,4,5]
|
e=a[a.length-1];
|
5
|
|
