Method getMatchingAliases

src/helpViewer/index.ts:494–517

(
        token: string,
    )

    }

    public async getMatchingAliases(
        token: string,
    ): Promise<Alias[] | undefined> {
        const aliases = await this.getAllAliases(true);
        if(!aliases){
            return undefined;
        }

        const matchingAliases = aliases.filter(
            (alias) =>
                token === alias.alias ||
                token === `${alias.package}::${alias.alias}` ||
                token === `${alias.package}:::${alias.alias}`,
        );
        
        // Filter out identical aliases. This would cause noticeable delay on the full list.
        const aliasesIdentical = (a1: Alias, a2: Alias) => (
            a1.package === a2.package
            && a1.name.replace(/^dot-/, '.') === a2.name.replace(/^dot-/, '.')
        );
        const uniqueAliases = uniqueEntries(matchingAliases, aliasesIdentical);

        return uniqueAliases;
    }

    // search function, similar to calling `?` in R
    public async searchHelpByAlias(): Promise<boolean> {