|
|
|
Count
|
Length of string
|
a="abc";
|
i=a.length;
|
3
|
Retrieve by index
|
Retrieve 1st char
|
a="abc";
|
c=a[0];
|
a
|
|
Retrieve last char
|
a="abc";
|
c=a[a.length-1];
|
c
|
|
Retrieve char 'n'
|
a="abcdef";
n=2;
|
c=a[n];
|
c
|
Slice
|
Slice from index 'm' to 'n' (inclusive)
|
a="abcdefghi";
m=3;
n=6;
|
s=a.slice(m,n+1);
|
defg
|
|
Slice from index 'n' (inclusive)
|
a="abcdefghi";
n=3;
|
s=a.slice(n);
|
defghi
|
|
Slice up to index 'n' (inclusive)
|
a="abcdefghi";
n=3;
|
s=a.slice(0,n+1);
|
abcd
|
Compare
|
Test for equality (case sensitive)
|
a="abcdef";
b="abc";
|
t=(a==b);
|
0
|
|
Test for prefix
|
a="abcdef";
b="abc";
|
re=new RegExp('^'+b);
t=a.match(re);
|
1
|
|
Test for suffix
|
a="abcdef";
b="def";
|
re=new RegExp(b+'$');
t=a.match(re);
|
1
|
Search
|
Test char 'is in' string
|
a="abcdefghi";
c='c';
|
t=(a.indexOf(c)!=-1);
|
1
|
|
Test substring 'is in' string
|
a="abcdefghi";
b="abc";
|
t=(a.indexOf(b)!=-1);
|
1
|
|
Find index of char (forward)
|
a="abcdefccccc";
c='c';
|
i=a.indexOf(c);
|
2
|
|
Find index of char (reverse)
|
a="abcdefccccc";
c='c';
|
i=a.lastIndexOf(c);
|
10
|
|
Find index of substring (forward)
|
a="abcdefabc";
b="abc";
|
i=a.indexOf(b);
|
0
|
|
Find index of substring (reverse)
|
a="abcdefabc";
b="abc";
|
i=a.lastIndexOf(b);
|
6
|
Split
|
Split on char
|
a="one,two,three";
c=',';
|
sa=a.split(c);
|
one two three
|
Evaluate
|
Evaluate empty string
|
a="";
|
t=a;
|
0
|
|
Evaluate non-empty string
|
a="abcdef";
|
t=a;
|
1
|
Insert
|
Prepend char
|
a="bcdef";
c='a';
|
a=c+a;
|
abcdef
|
|
Append char
|
a="abc";
c='d';
|
a=a+c;
|
abcd
|
|
Prepend string
|
a="def";
b="abc";
|
a=b+a;
|
abcdef
|
|
Append string
|
a="abc";
b="def";
|
a=a+b;
|
abcdef
|
|
Concatenate 'a' and 'b'
|
a="abc";
b="def";
|
s=a+b;
|
abcdef
|
Overwrite
|
Overwrite char at index 'n'
|
a="abc";
n=1;
c='B';
|
a=a .slice(0 ,n)+c+a.slice(n+1);
|
aBc
|
|
Overwrite substring at index 'n'
|
a="abcdefghi";
b="DEF";
n=3;
|
a=a .slice(0 ,n) +b+a.slice(n+b.length);
|
abcDEFghi
|
Replace
|
Replace 1st instance of char 'X' with 'Y'
|
a="XXXYYYZZZ"
|
a=a.replace('X','Y');
|
YXXYYYZZZ
|
|
Replace all instances of char 'X' with 'Y'
|
a="XXXYYYZZZ"
|
a=a.replace(/X/g,'Y');
|
YYYYYYZZZ
|
|
Replace 1st instance of substring 'abc' with 'XYZ'
|
a="abcdefabc"
|
a=a .replace('abc','XYZ');
|
XYZdefabc
|
|
Replace all instances of substring 'abc' with 'XYZ'
|
a="abcdefabc"
|
a=a .replace(/abc/g,'XYZ');
|
XYZdefXYZ
|
|
Replace all instances of 'X','Y','Z' with 'A','B','C' respectively
|
a="XXXYYYZZZ";
|
a=a .replace(/X/g ,'A') .replace(/Y/g ,'B').replace(/Z/g,'C');
|
AAABBBCCC
|
Remove
|
Remove 1st instance of char 'X'
|
a="XXXYYYZZZ";
|
a=a.replace('X','');
|
XXYYYZZZ
|
|
Remove all instances of char 'X'
|
a="XXXYYYZZZ";
|
a=a.replace(/X/g,'');
|
YYYZZZ
|
|
Remove 1st instance of substring 'abc'
|
a="abcdefabc";
|
a=a.replace('abc','');
|
defabc
|
|
Remove all instances of substring 'abc'
|
a="abcdefabc";
|
a=a.replace(/abc/g,'');
|
def
|
|
Remove prefix 'abc.'
|
a="abc.abc.def"
|
a=a.replace(/^abc./,'');
|
abc.def
|
|
Remove suffix '.def'
|
a="abc.def.def"
|
a=a.replace(/.def$/,'');
|
abc.def
|
Remove by index
|
Remove 1st char
|
a="abcdef";
|
a=a.slice(1);
|
bcdef
|
|
Remove last char
|
a="abcdefghi";
|
a=a.slice(0,a.length-1);
|
abcdefgh
|
|
Remove char at index 'n'
|
a="abcdef";
n=3;
|
a=a .slice(0 ,n)+a.slice(n+1);
|
abcef
|
|
Remove chars in index range 'm' to 'n' (inclusive)
|
a="abcdef";
m=2;
n=4;
|
a=a .slice(0 ,m)+a.slice(n+1);
|
abf
|
|
Remove chars from index 'n' onwards (inclusive)
|
a="abcdefghi";
n=3;
|
a=a.slice(0,n);
|
abc
|
|
Remove chars up to index 'n' (inclusive)
|
a="abcdefghi";
n=3;
|
a=a.slice(n+1);
|
efghi
|
Trim
|
Trim leading white space
|
a=" abc def ";
|
a=a.replace(/^[ ]*/,'');
|
abc def
|
|
Trim trailing white space
|
a=" abc def ";
|
a=a.replace(/[ ]*$/,'');
|
abc def
|
|
Trim leading and trailing white space
|
a=" abc def ";
|
a=a.replace(/^[ ]*/,'').replace(/[ ]*$/,'');
|
abc def
|
Sort
|
Sort in ascending order
|
a="cafdeb";
|
sa=a.split('');
sa.sort();
a=sa.join('');
|
abcdef
|
|
Sort in descending order
|
a="cafdeb";
|
sa=a.split('');
sa.sort();
sa.reverse();
a=sa.join('');
|
fedcba
|
|
Sort in custom order
|
a="cafdeb";
|
sa=a.split('');
sa.sort( function (a, b) { return b.charCodeAt(0) - a.charCodeAt(0); } );
a=sa.join('');
|
fedcba
|
|
Reverse
|
a="abcdefghi";
|
sa=a.split('');
sa.reverse();
a=sa.join('');
|
ihgfedcba
|
Convert case
|
Convert to lower case
|
a="ABCDEFGHI";
|
a=a.toLowerCase();
|
abcdefghi
|
|
Convert to upper case
|
a="abcdefghi";
|
a=a.toUpperCase();
|
ABCDEFGHI
|
|
