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| export function Unscrambler(list: string[]) { | |
| // helper functions | |
| const firstChar = (str: string) => str.charAt(0); | |
| const secondChar = (str: string) => str.charAt(1); | |
| const lastChar = (str: string) => str.charAt(str.length - 1); | |
| const secondLastChar = (str: string) => str.charAt(str.length - 2); | |
| const hasFirst = (str: string): boolean => firstChar(str) === '_'; | |
| const hasLast = (str: string): boolean => str.slice(-1) === '_'; | |
| const hasTo = (str: string): boolean => (str.split('to')).length > 1; | |
| const hasFrom = (str: string): boolean => (str.split('from')).length > 1; | |
| /** | |
| * Returns obj = { | |
| * 'first': 'N', | |
| * 'N': 'A', | |
| * 'A': 'I', | |
| * 'I': 'R', | |
| * 'R': 'O', | |
| * 'O': 'B', | |
| * 'B': 'I', | |
| */ | |
| const makeNameObj = (strList: string[]): any => { | |
| const nameObj: any = {}; | |
| strList.forEach((str) => { | |
| if (hasFirst(str)) { | |
| // '_NtoA' OR '_AfromN' => 'first': 'N' | |
| // 'N': 'A', | |
| if (hasTo(str)){ | |
| nameObj.first = secondChar(str); | |
| nameObj[nameObj.first] = lastChar(str); | |
| } else { | |
| nameObj.first = str.slice(-1); | |
| nameObj[nameObj.first] = firstChar(str); | |
| } | |
| } else if (hasLast(str)) { | |
| // '_BtoI' OR 'IfromB_' => 'B': 'I' | |
| if (hasTo(str)){ | |
| nameObj[firstChar(str)] = secondLastChar(str); | |
| } else { | |
| nameObj[secondLastChar(str)] = firstChar(str); | |
| } | |
| } else { | |
| // 'RtoO' => 'R': 'O' | |
| if (hasTo(str)) { | |
| nameObj[firstChar(str)] = lastChar(str); | |
| } | |
| // 'OfromR' => 'R': 'O' | |
| else if (hasFrom(str)) { | |
| nameObj[lastChar(str)] = firstChar(str); | |
| } | |
| } | |
| }); | |
| return nameObj; | |
| }; | |
| /** | |
| * Returns sorted name | |
| */ | |
| const nameSorter = (obj: any): string => { | |
| let getKey = 'first'; | |
| let name = ''; | |
| let count = 0; | |
| while (count < Object.keys(obj).length) { | |
| name += (obj[getKey]); | |
| getKey = obj[getKey]; | |
| count++; | |
| } | |
| return name; | |
| }; | |
| const nameMaker = (strList: string[]) => { | |
| const obj = makeNameObj(strList); | |
| return nameSorter(obj); | |
| }; | |
| return (nameMaker(list)); | |
| } |
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