function - How to overload method in TypeScript? -


i have method taking object's parameters in signature. want pass object instead of many parameters , on other hand, don't want change existing method's signature because it's being used @ multiple places. want both methods. when i'm trying write code, gives me errorduplicate function implementation.

    getsearchdata(fetchdata: fetchdata,languagecode: string, sorting: string, maxresultcount: number, skipcount: number): observable<pagedresultdtooffetchdata> {      getsearchdata(datalevel: number, codetype: number, datacode: string, desclong: string, languagecode: string, dataparent: string, sorting: string, maxresultcount: number, skipcount: number): observable<pagedresultdtooffetchdata> {

fyi datalevel, codetype, datacode, desclong, dataparent properties of fetchdata.

typescript able overload functions, has particularities in contrast other oop languages, such c++. looking ar ref , despite fact methods have different number of arguments, avoid compiler errros doing this:

class funoverloadclass {     getsearchdata(datalevel: number, codetype: number, datacode: string, desclong: string, languagecode: string, dataparent: string, sorting: string, maxresultcount: number, skipcount: number): observable<pagedresultdtooffetchdata>;     getsearchdata(fetchdata: fetchdata, languagecode: string, sorting: string, maxresultcount: number, skipcount: number): observable<pagedresultdtooffetchdata>;      getsearchdata(stringornumberparameter: any, secondparam: any, thirdparam: any, fourthparam: any, fifthparam: any, dataparent?: string, sorting?: string, maxresultcount?: number, skipcount?: number): string {         if (stringornumberparameter && typeof stringornumberparameter == "number")             alert("variant #1: numberparameter = " + stringornumberparameter);         else             alert("variant #1: stringparameter = " + stringornumberparameter);     } }

where used dataparent?: string, ?: operator specifies parameter named dataparent of type string optional.


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