Snippet regex: match arbitrary number of groups and transform to CamelCase

Question

In a Visual Studio Code Snippet I\'m writing I want to convert a snake case string to camel case.

From the docs I know that the syntax is

\'${\' var         


        

Answer 1

vs code snippet transform to camelCase:

"test": {
    "prefix": "test",
    "body": [
        "${1:${TM_FILENAME_BASE/^(.)([a-zA-Z0-9]*)([-_.])(.*)/${1:/downcase}${2}${4:/pascalcase}/}}"
    ]
}

wrapper is ${1:},

inner is ${TM_FILENAME_BASE/^(.)([a-zA-Z0-9]*)([-_.])(.*)/${1:/downcase}${2}${4:/pascalcase}/}

wrapper is ${}

inner is TM_FILENAME_BASE/^(.)([a-zA-Z0-9]*)([_\\W])(.*)/${1:/downcase}${2}${4:/pascalcase}/

string is TM_FILENAME_BASE

-------------------------------------------------------split

part 1 is /^(.)([a-zA-Z0-9]*)([-_.])(.*)

part 1.1 is ^(.) → $1, first character

part 1.2 is ([a-zA-Z0-9]*) → $2

part 1.3 is ([_\\W]) → $3, delimiter, ignore

part 1.4 is (.*) → $4

-------------------------------------------------------replace

part 2 is /${1:/downcase}${2}${4:/pascalcase}/

part 2.1 ${1:/downcase} → lowercase

part 2.2 ${2} → normal

part 2.3 ${4:/pascalcase}

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for-bar.service.js → fooBarService

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Not strong enough, but enough.