I want to split a string into an array containing all leading digits as one value and the rest of the string as the second value:
3px -> Array('3','px')
01b -> Array('01','b')
01 -> Array('01','')
b -> Array('','b')
1.5 -> Array('1','.5')
300,5 -> Array('300',',5')
a1 -> Array('','a1')
In PHP you could do something like:
$matches = array();
preg_match('/([0-9]+)([^0-9]+)/',$value,$matches);
I'd use .match instead of split: match and capture digits, then match and capture anything else in a different capture group:
const doSplit = str => {
const [, ...arr] = str.match(/(\d*)([\s\S]*)/);
return arr;
};
console.log(
doSplit('3px'),
doSplit('01b'),
doSplit('01'),
doSplit('b'),
);(\d*) - matches digits([\s\S]*) - matches absolutely anything after that
You can do somethinglike this:
var str = "Hello world!";
var res = [str.substring(0, 1), str.substring(1)];
This stores the string in a variable, and then creates an array containing 2 elements. The first will be a substring of the string containing the value from the start to the 1st position, and the second value will be a substring containing the value from the second position, and as no second parameter is supplied, until the end.
Here is my take on this one. Hope it helps.
Good luck!
function parseString(str) {
var num = [];
var nonNum = [];
for (let i of str.split("")) {
if (/\D/.test(i)) {
nonNum.push(i)
break;
} else {
num.push(i)
}
}
if (num.length !== 0) {
return [num.join(""), str.substring(num.length)]
} else {
return (num.length === 0) ? ["", str] : [num.join(""), ""]
}
}
console.log(parseString("3px"), parseString("01b"), parseString("01"), parseString("b"), parseString("1.5"), parseString("300,5"), parseString("a1"))
I feel this question points out a benefit in PHP which we do not enjoy in Javascript. I wrote a little hack for this. I hope it helps.
function split_non_numeric(str){
let strValue = '';
let intValue = parseInt(str, 10);
let matchPattern = str.match(new RegExp(intValue));
if(matchPattern === null){
intValue = '';
strValue = str;
}else{
if(matchPattern.index > 0){
intValue = str.substr(0, matchPattern.index + matchPattern[0].length);
strValue = str.substr(matchPattern.index + matchPattern[0].length);
}else{
intValue = str.slice(matchPattern.index, matchPattern[0].length)
strValue = str.substr(matchPattern[0].length);
}
}
return [intValue, strValue];
}
console.log(split_non_numeric('3px')); // [ '3', 'px' ]
console.log(split_non_numeric('01b')); // [ '01', 'b' ]
console.log(split_non_numeric('01')); // [ '01', '' ]
console.log(split_non_numeric('b')); // [ '', 'b' ]
console.log(split_non_numeric('1.5')); // [ '1', '.5' ]
console.log(split_non_numeric('300,5')); // [ '300', ',5' ]
console.log(split_non_numeric('a1')); // [ '', 'a1' ]