How to split a string at a specific point defined by a number?
In example generate two variables, t1 and t2 from the string '123456' and have it split at character 3 so t1's value is '123' and t2's value is '456'...
var s0 = '123456';
console.log(s1);//123
console.log(s2);//456
I'd suggest:
var s0 = '123456',
t1 = s0.substring(0, s0.indexOf(3) + 1),
t2 = s0.substring(s0.indexOf(3) + 1);
References:
substr; it should be more efficient than using a for loop, I'll accept this when the timer expires, thanks.substr and substring?
substr() allows for negative indices, whereas substring() does not. Other than that it's largely personal preference, and I prefer substring().substr though I usually have to use .length on the second parameter so +1 for the extra insight.If you meant the 3rd character:
var ch = 3;
var s0 = "123456";
var s1 = s0.substr(0,ch); // will be '123'
var s2 = s0.substr(ch); // will be '456'
substr and I did not learn the difference between substr and substring. +1 for what would have been my original approach.You can just do this.
var s0 = '123456';
var arr = s0.split('3');
var t1 = arr[0] + '3', t2 = arr[1];
'3' character, which isn't necessarily the third character in the sequence. Having said that, in his own answer it does seem to be the third character...so, who knows?
Something like:
var foo = '123456'
,bar = [foo.slice(0,3), foo.slice(3)];
//=> bar now ["123", "456"]
Extend the String prototype:
String.prototype.splitAt = function(n) {
return n && n < this.length
? [this.slice(0,n), this.slice(n)]
: this;
}
// usages
'123456'.splitAt(3); //=> ['123', '456']
'123456'.splitAt(2); //=> ['12', '3456']
'123456'.splitAt(12); //=> '123456'
'123456'.splitAt(); //=> '123456'
substring answer I'm sure that this will fit better for others regardless. Plus I've got to break in to prototype at some point...Try
var s0 = "123456"
, s1 = s0.slice(0, 3); // first 3 characters in string , `123`
, s2 = s0.slice(- (s0.length - s1.length) ); // remainder of string , `456`(+)
console.log(s0, s1, s2)
var s = '123456';
var sos = 3;//number to split by
var t1 = '';
var t2 = '';
for (var i = 0; i < s.length; i++)
{
if (i<sos) {t1 += s[i];}
else {t2 += s[i];}
}
console.log('t1 = '+t1);
console.log('t2 = '+t2);
substr which I completely forgot about.