What is the best way to isolate the text before a particular segment within a string, excluding any blank spaces?

Question

What is the best way to isolate the text before a particular segment within a string, excluding any blank spaces?

Is it possible to use vanilla JavaScript in order to extract the first string value directly to the left of a specified portion of a longer string, excluding any blank spaces?

Consider the following string: 1 hr 30 min

How could you extract the 1 located to the left of hr, and also how could you obtain the 30 situated to the left of min?

let string = "1 hr 30 min";
if (string.includes("hr")) {
    // code to retrieve the value 1
}
if (string.includes("min")) {
    // code to retrieve the value 30
}

javascript

Answer 1

Answer №1

Here is a function that can help you extract hours and minutes from a string then convert them to integers:

const getHoursAndMin = () => {
  const _text = text.replace('min','')
  const [hours, minutes] = _text.split('hr')
  console.log(parseInt(hours), parseInt(minutes))
}

Answer 2

Here is a function that can help you extract hours and minutes from a string then convert them to integers:

const getHoursAndMin = () => {
  const _text = text.replace('min','')
  const [hours, minutes] = _text.split('hr')
  console.log(parseInt(hours), parseInt(minutes))
}

Answer 3

Answer №2

If you follow this method, you will have great control over the outcome.

Ensuring the input string is correct within the function.

"use strict";
function zeroFill(str, width) {
    width -= str.toString().length;
    if (width > 0) {
        return new Array(width + (/\./.test(str) ? 2 : 1)).join('0') + str;
    }
    return str + ""; // always return a string
}
function getHoursOrMin(str, extract, returnType) {
    const _str = str.split(' ');
    let result = "";
    switch (extract) {
        case 'hr':
            const iHr = _str.indexOf('hr');
            result = _str[iHr - 1];
            break;
        case 'min':
            const iMin = _str.indexOf('min');
            result = _str[iMin - 1];
            break;
    }
    switch (returnType) {
        case 'number':
            return Number(result);
        case 'string':
            return result;
        case 'stringZeroFill':
            return zeroFill(result, 2);
    }
}
const str = "1 hr 30 min";
console.log(`${getHoursOrMin(str, 'hr', 'number')}:${getHoursOrMin(str, 'min', 'number')}`);
console.log(`${getHoursOrMin(str, 'hr', 'string')}:${getHoursOrMin(str, 'min', 'string')}`);
console.log(`${getHoursOrMin(str, 'hr', 'stringZeroFill')}:${getHoursOrMin(str, 'min', 'stringZeroFill')}`);

Answer 4

If you follow this method, you will have great control over the outcome.

Ensuring the input string is correct within the function.

"use strict";
function zeroFill(str, width) {
    width -= str.toString().length;
    if (width > 0) {
        return new Array(width + (/\./.test(str) ? 2 : 1)).join('0') + str;
    }
    return str + ""; // always return a string
}
function getHoursOrMin(str, extract, returnType) {
    const _str = str.split(' ');
    let result = "";
    switch (extract) {
        case 'hr':
            const iHr = _str.indexOf('hr');
            result = _str[iHr - 1];
            break;
        case 'min':
            const iMin = _str.indexOf('min');
            result = _str[iMin - 1];
            break;
    }
    switch (returnType) {
        case 'number':
            return Number(result);
        case 'string':
            return result;
        case 'stringZeroFill':
            return zeroFill(result, 2);
    }
}
const str = "1 hr 30 min";
console.log(`${getHoursOrMin(str, 'hr', 'number')}:${getHoursOrMin(str, 'min', 'number')}`);
console.log(`${getHoursOrMin(str, 'hr', 'string')}:${getHoursOrMin(str, 'min', 'string')}`);
console.log(`${getHoursOrMin(str, 'hr', 'stringZeroFill')}:${getHoursOrMin(str, 'min', 'stringZeroFill')}`);

What is the best way to isolate the text before a particular segment within a string, excluding any blank spaces?

Answer №1

Answer №2

Similar questions

Remove the bottom border from the active tab by utilizing the <div> and <a> elements

Implementing a function to save a file to a nested directory in node.js

What is the total amount within a specified date range when retrieved as JSON?

I must adjust the size of images based on the size of the viewer's screen

Surprising pause in the menu transition animation

Unsuccessful attempt at testing RequireJS in a straightforward manner

Experiencing a console error which reads: "SyntaxError: Missing ) after argument list."

When loading a page in NodeJS and Express, there are no initial displays, but upon refreshing the page, all data is successfully retrieved

When using JSON stringify, double quotes are automatically added around any float type data

Issue with IntersectionObserver not detecting intersection when the root element is specified

Persistent vertical menu dropdown that remains expanded on sub menu pages

The functions getFiles and getFolders will consistently retrieve a single file or folder each time they are

Various successful functions in Ajax

Unable to retrieve $scope.property using direct access, however it is visible when printed to the console using console.log($

the issue of undefined values continue to persist

Arrange the select default option using AngularJS as the first option

Using jqgrid to generate a hyperlink that corresponds to the data's value

Combining and removing identical values in JavaScript

Utilize AngularJS to compile a roster of participants

What is the best way to create a JavaScript animation for altering the width of a div element?