03. Extract File

function extractFile(input) {
    // let pattern = /[\\]{1}[A-Za-z]+\.[a-z]+/g
    // let [fileName, fileExtension] = input.match(pattern)[0].substring(1).split('.');
    if (input.indexOf(':')===1
        && input.indexOf(':') + 1 === input.indexOf('\\')
         && input.lastIndexOf('\\') < input.lastIndexOf('.')) {

        let output = input.substring(input.lastIndexOf('\\') + 1);
        let fileName = output.substring(0,output.lastIndexOf('.'))
        let fileExtension = output.substring(output.lastIndexOf('.')+1)

        if (fileName && fileExtension &&
            fileExtension.length >= 2 && input.length > (fileName.concat(`.${fileExtension}`)).length
            && input.includes(':') && input.indexOf(':') < input.indexOf('.')) {
            console.log(`File name: ${fileName}`)
            console.log(`File extension: ${fileExtension}`)
        }
    }
}