/**
 * Returns the same string is kebab-case form. Returned string is guaranteed to
 * only contain a-z, numbers, and dashes. All other symbols such as dollar
 * signs and accented characters will be removed (for better or for worse).
 * @param text The string to convert.
 */
export declare function kebabify(text: string): string;
/**
 * Returns the same string in CONST_CASE form. Returned string is guaranteed to
 * only contain A-Z, numbers, and underscores. All other symbols such as dollar
 * signs and accented characters will be removed (for better or for worse).
 * @param input The string to convert.
 */
export declare function constify(text: string): string;
/**
 * Creates a list with the specified things, joining them with the provided
 * separators. Returns an empty string if there's no items.
 * @param list The list of things.
 * @param normalSeparator The separator to use the normal case.
 * @param finalSeparator The separator to use for the final item.
 * @param pairSeparator The separator to use if there's only 2 items.
 */
export declare function listify(list: string[], normalSeparator: string, finalSeparator: string, pairSeparator: string): string;
/**
 * Creates a list with the specified things, joining them with the word "and",
 * e.g. "A, B, and C". Returns an empty string if there's no items.
 * @param list The list of things.
 */
export declare function listifyAnd(list: string[]): string;
/**
 * Creates a list with the specified things, joining them with the word "or",
 * e.g. "A, B, or C". Returns an empty string if there's no items.
 * @param list The list of things.
 */
export declare function listifyOr(list: string[]): string;
/**
 * Returns true if the string is non-null, non-undefined, and has length > 0.
 * @param str The string to check.
 */
export declare function isPresent(str: string | null | undefined): str is string;
/**
 * Sorts two strings in such a way that "item1" < "item 2" < "item10".
 * @param a String 1.
 * @param b String 2.
 */
export declare function numberWiseSort(a: string, b: string): number;