Searching for a file sequence using Regular Expressions in JavaScript

Question

Searching for a file sequence using Regular Expressions in JavaScript

I have a query that needs answering:

How can I utilize RegExp in JavaScript to locate strings that adhere to this filter: *[0-9].png for the purpose of filtering out sequences of files.

For instance:

dog001.png
dog002.png
dog003.png

or

xyz_1.png
xyz_2.png

The goal is to disregard strings like xyz_1b.png and xyz_xyz.png. This will be used within a getFiles function.

var regExp = new RegExp(???);
var files = dir.getFiles(regExp);

Many thanks in advance!

EDIT:

If I have a specific string, let's say

var beginningStr = "dog";

How do I verify if a string fits the filter

beginningStr[0-9].png

? And ideally allowing for the use of beginningString without regard to case sensitivity. This way, the filter would accept Dog01 and DOG02 as well.

Thanks once again!

javascript regex filenames

Answer 1

Answer №1

Any string that contains a number followed by ".png":

/^.*[0-9]\.png$/i

Alternatively, just the part with the number and ".png" at the end (regex will detect it automatically):

/[0-9]\.png$/i

Answer 2

Any string that contains a number followed by ".png":

/^.*[0-9]\.png$/i

Alternatively, just the part with the number and ".png" at the end (regex will detect it automatically):

/[0-9]\.png$/i

Answer 3

Answer №2

To clarify, you are in need of a regular expression that can identify files with the following characteristics:

Start with lowercase or uppercase letters from a to z
May optionally have an underscore (_) after the initial letter
Contain one or more digits after the letter/underscore combination
Finish with the extension .png

The regex pattern for this requirement is [a-zA-Z]_{0,1}+\d+\.png

You might find it helpful to use online tools that provide real-time explanations and assistance when crafting regex patterns.

Answer 4

To clarify, you are in need of a regular expression that can identify files with the following characteristics:

Start with lowercase or uppercase letters from a to z
May optionally have an underscore (_) after the initial letter
Contain one or more digits after the letter/underscore combination
Finish with the extension .png

The regex pattern for this requirement is [a-zA-Z]_{0,1}+\d+\.png

You might find it helpful to use online tools that provide real-time explanations and assistance when crafting regex patterns.

Answer 5

Answer №3

If my comprehension is accurate,

const regEx = /[a-zA-Z]*[0-9]+\.png\s/g;
const filesArray = inputString.match(regEx);
filesArray.sort();// you may choose to implement a custom sorting function

Kindly provide clarification on the purpose of the dir variable.

Answer 6

If my comprehension is accurate,

const regEx = /[a-zA-Z]*[0-9]+\.png\s/g;
const filesArray = inputString.match(regEx);
filesArray.sort();// you may choose to implement a custom sorting function

Kindly provide clarification on the purpose of the dir variable.

Searching for a file sequence using Regular Expressions in JavaScript

Answer №1

Answer №2

Answer №3

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