Camel Case to Sentence Case Converter

camelToSentence.ts

const camelEdges: RegExp = /([A-Z](?=[A-Z][a-z])|[^A-Z](?=[A-Z])|[a-zA-Z](?=[^a-zA-Z]))/g;

// Input Array consisting of codes starting with "WS_Something_"
const inputArray: string[] = [
  "WS_BLDNGMGMT_CertificationUpdateFailed",
  "WS_USRMGMT_CompanyNotFound",
  "WS_GEN_UnauthorizedOperation",
];

// Values of the resultObject will be the converted strings
let resultObject: {[key: string]: string} = {};

for (let code of inputArray) {
    const lastIndex: number = code.lastIndexOf("_");

    // Get the substring after the last underscore
    const pascalValue: string = code.slice(lastIndex + 1);

    const convertedValue: string = pascalValue.replace(camelEdges,'$1 ');

    resultObject[code] = convertedValue;
}

console.log(resultObject);

/** Output
{
  "WS_BLDNGMGMT_CertificationUpdateFailed": "Certification Update Failed",
  "WS_USRMGMT_CompanyNotFound": "Company Not Found",
  "WS_GEN_UnauthorizedOperation": "Unauthorized Operation"
}
*/