I have some strings containing blood pressure data, the numbers before the / indicate the higher/upper end of the blood pressure (systolic), and the numbers after the / indicate the lower end of the blood pressure (diastolic).
The strings are like this
let str1 = "170/80"; // Should Pass
let str2 = "90/60"; // Should Pass
let str3 = "140/90"; // Should Pass
let str4 = "should not/pass"; // Shouldn't Pass
I have a regex that tries to make sure that these strings indeed are blood pressure readings, i.e., making sure that the values are all numbers and in between them is a / but it doesn't seem to work (It's not matching even with the supposedly correct strings).
My regex is: ((\d)/(\d))
Can anyone tell me why it's not working? and what should be the correct regex for this?
As mentioned in the comments, you can use \d+ to match multiple digits. However, if your text can contain other numbers, you might want to use the more specific \d{1,3} to capture only values in the valid range for blood pressure. The complete regex would be ((\d{1,3})\/(\d{1,3}))
Escape the slash and use more than one digit
https://regex101.com/r/uC2w4h/1
Here with sanity tests to remove dates or other weird numbers. Change 45 to however low you want to test.
const str = `170/80 90/60 140/90 should not/pass on 11/12`
const bps = [...str.match(/(\d{2,3})\/(\d{2,3})/g)].filter(match => {
const [syst,diast] = match.split("/")
return +syst > 45 && diast > 45;
})
console.log(bps)