I'm trying to parse time strings and transcode them into an object I am gonna call time module. It is just a simple dictionary object with complete time disclosure.
The thing is that I have to match string consisting of a number and time unit. Currently I am trying to match this regex:
/^(([1-9][0-9]*)(y|m|w|d|h|min|s))+$/g.
I need it to yield every single match. So if I feed it this string: 12y12m12w12d12h12min12s - it should return something like this array:
[
'12y12m12w12d12h12min12s', // Matching string
'12y',
'12',
'y',
'12m',
'12',
'm',
'12w',
'12',
'w',
'12d',
'12',
'd',
'12h',
'12',
'h',
'12min',
'12',
'min',
'12s',
'12',
's',
index: 0,
input: '12y12m12w12d12h12min12s',
groups: undefined
]
Instead, it returns only the last unit:
[
'12y12m12w12d12h12min12s',
'12s',
'12',
's',
index: 0,
input: '12y12m12w12d12h12min12s',
groups: undefined
]
Can I do this thing using regex? How?
Capture groups only capture the last match.
The new matchAll method due in ES2020 (and easily polyfilled) gets you quite close if you remove the anchors and flatten the result:
const rex = /([1-9][0-9]*)(y|min|m|w|d|h|s)/g;
const str = "12y12m12w12d12h12min12s";
const array = [...str.matchAll(rex)].flat();
console.log(array);
That doesn't give you the overall whole string match (if you want it, insert in the array), but it gives you all the rest:
Live Example:
const rex = /([1-9][0-9]*)(y|min|m|w|d|h|s)/g;
const str = "12y12m12w12d12h12min12s";
const array = [...str.matchAll(rex)].flat();
console.log(array);.as-console-wrapper {
max-height: 100% !important;
}If you don't want to use matchAll, you'll need a loop:
const result = [];
let match;
while ((match = rex.exec(str)) !== null) {
result.push(...match);
}
Live Example:
const rex = /([1-9][0-9]*)(y|min|m|w|d|h|s)/g;
const str = "12y12m12w12d12h12min12s";
const result = [];
let match;
while ((match = rex.exec(str)) !== null) {
result.push(...match);
}
console.log(result);.as-console-wrapper {
max-height: 100% !important;
}