Filter array containing only specific word [duplicate]

Question

I have a list of array. I want to get the items that start with "tar" and number followed by it

var array = ["dataseqno", "yrsno", "tar01", "tar02", "tar03", "tar04", "tar05", "tar06", "tar07", "tar08", "tar09", "tar10", "tar11", "tar12", "status"]

I will do the loop to this array and check using regex. This is the regex I have tried. But I couldnot solve number followed by 'tar'.

.match(/^tar+\[0-9]/)

Answer 1

Use filter() on the array, and change your regex to ^tar[0-9]+ like so:

var array = ["dataseqno", "yrsno", "tar01", "tar02", "tar03", "tar04", "tar05", "tar06", "tar07", "tar08", "tar09", "tar10", "tar11", "tar12", "status"];

var match = array.filter(str => str.match(/^tar[0-9]+/));

console.log(match);

This checks if the element starts with tar at the start of the string, then contains any digits afterwards.

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Breakdown of the regex, character by character:

^

Match the start of the string

tar

Match the string tar

[0-9]

Match any characters in the character set 0-9 (will match 0, 1, 2, 3, 4, 5, 6, 7, 8, 9)

+

Match one or more of the previous selector