Cara menggunakan javascript regex practice

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Regular Expressions 101
Regular Expressions 101
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Regular ExpressionNo Match
Test String
JavaScript Validation with regular expression [21 exercises with solution]
JavaScript: Tips of the Day
Apa itu regex javascript?
Apa yang dimaksud dengan Regular Expression?
Method untuk memeriksa apakah sebuah string lolos dari pola regular expression yang diinput?

Regular Expressions 101

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Regular Expressions 101

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Regular ExpressionNo Match

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Last update on August 19 2022 21:50:50 (UTC/GMT +8 hours)

JavaScript Validation with regular expression [21 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts.]

1. Write a JavaScript program to test the first character of a string is uppercase or not. Go to the editor
Click me to see the solution

2. Write a JavaScript program to check a credit card number. Go to the editor
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3. Write a pattern that matches e-mail addresses. Go to the editor
The personal information part contains the following ASCII characters.

Uppercase (A-Z) and lowercase (a-z) English letters.
Digits (0-9).
Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
Character . ( period, dot or fullstop) provided that it is not the first or last character and it will not come one after the other.

Click me to see the solution

4. Write a JavaScript program to search a date within a string. Go to the editor

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5. Write a JavaScript program that work as a trim function (string) using regular expression. Go to the editor

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6. Write a JavaScript program to count number of words in string. Go to the editor
Note :
- Remove white-space from start and end position.
- Convert 2 or more spaces to 1.
- Exclude newline with a start spacing.

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7. Write a JavaScript function to check whether a given value is IP value or not. Go to the editor

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8. Write a JavaScript function to count the number of vowels in a given string. Go to the editor
Test Data :
console.log(alphabetize_string('United States'));
Output :
"SUadeeinsttt"

Click me to see the solution

9. Write a JavaScript function to check whether a given value is an valid url or not. Go to the editor

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10. Write a JavaScript function to check whether a given value is alpha numeric or not. Go to the editor

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11. Write a JavaScript function to check whether a given value is time string or not. Go to the editor

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12. Write a JavaScript function to check whether a given value is US zip code or not. Go to the editor

Click me to see the solution

13. Write a JavaScript function to check whether a given value is UK Post Code or not. Go to the editor

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14. Write a JavaScript function to check whether a given value is Canada Post Code or not. Go to the editor

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15. Write a JavaScript function to check whether a given value is a social security number or not. Go to the editor

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16. Write a JavaScript function to check whether a given value is hexadecimal value or not. Go to the editor

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17. Write a JavaScript function to check whether a given value is hexcolor value or not. Go to the editor

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18. Write a JavaScript function to check whether a given value represents a domain or not. Go to the editor

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19. Write a JavaScript function to check whether a given value is html or not.Go to the editor

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20. Write a JavaScript function to check a given value contains alpha, dash and underscore. Go to the editor

Click me to see the solution

21. Write a JavaScript function to print an integer with commas as thousands separators. Go to the editor

Test Data :
console.log(thousands_separators(1000));
"1,000"
console.log(thousands_separators(10000.23));
"10,000.23"
console.log(thousands_separators(100000));
"100,000"

Click me to see the solution

More to Come !

* To run the code mouse over on Result panel and click on 'RERUN' button.*

Live Demo:

See the Pen javascript-common-editor by w3resource (@w3resource) on CodePen.

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

JavaScript: Tips of the Day

Destructuring

const numbers = [1, 2, 3, 4, 5];
const [y] = numbers;

console.log(y);

We can unpack values from arrays or properties from objects through destructuring. For example:

[a, b] = [1, 2];

The value of a is now 1, and the value of b is now 2. What we actually did in the question, is:

[y] = [1, 2, 3, 4, 5];

This means that the value of y is equal to the first value in the array, which is the number 1. When we log y, 1 is returned.

Ref: https://bit.ly/323Y0P6

Apa itu regex javascript?

Regex adalah singkatan dari Regular Expresion. Regex merupakan sebuah teks (string) yang mendefinisikan sebuah pola pencarian sehingga dapat membantu kita untuk melakukan matching (pencocokan), locate (pencarian), dan manipulasi teks.

Apa yang dimaksud dengan Regular Expression?

Regular Expression (RE) adalah sebuah notasi yang dapat digunakan untuk mendeskripsikan pola dari kata yang ingin dicari. Sebagai contoh jika RE yang dibuat adalah ‹‹ nlp ›› maka kata yang akan cocok dengan pola ini hanya kata nlp (sama persis dengan yang ada pada RE).

Method untuk memeriksa apakah sebuah string lolos dari pola regular expression yang diinput?

Method test() digunakan untuk memeriksa apakah sebuah string lolos dari pola regular expression yang diinput. Jika lolos, hasilnya true. Jika tidak, hasilnya false.