ext-string-case v0.2.2

ExtStringCase

String Casing Helper

Beta version

String Casing Utility for converting strings to and from different casing styles, this NPM Package came to be since I found myself using 4 half baked packages in order to achieve these conversions.

Following casing styles are supported,

• Pascal
• Camel
• Snake
• Dash

there are also a bunch convenience/helper methods for dealing with strings.

Examples

Pascal case

ExtStringCase.snakeToPascalCase("welcome_to_the_jungle");
// Result: WelcomeToTheJungle

ExtStringCase.snakeToCamelCase("welcome_to_the_jungle");
// Result: welcomeToTheJungle

ExtStringCase.snakeToDashCase("welcome_to_the_jungle");
// Result: welcome-to-the-jungle

Dash case

ExtStringCase.dashToPascalCase("sweet-child-of-mine");
// Result: SweetChildOfMine

ExtStringCase.dashToCamelCase("sweet-child-of-mine");
// Result: sweetChildOfMine

ExtStringCase.dashToSnakeCase("sweet-child-of-mine");
// Result: sweet_child_of_mine

Pascal case

ExtStringCase.pascalToSnakeCase("UseYourIllusion");
// Result: use_your_illusion

ExtStringCase.pascalToDashCase("UseYourIllusion");
// Result: use-your-illusion

ExtStringCase.pascalToCamelCase("UseYourIllusion");
// Result: useYourIllusion

Camel case

ExtStringCase.camelToPascalCase("youCouldBeMine");
// Result: UseYourIllusion

ExtStringCase.camelToSnakeCase("youCouldBeMine");
// Result: useYourIllusion

ExtStringCase.camelToDashCase("youCouldBeMine");
// Result: use-your-illusion

Helper Methods

In order to perform these conversions a few helper methods was born as well and can be used independently of the conversion methods.

/**
 * Check wheter a string is assigned and has a length
 * @param str
 * @returns {boolean}
 */
public static validStr(str: any): boolean;

/**
 * Determines if the given char is a letter
 * @param char - char to test
 * @returns
 */
public static isLetter(char: string): boolean;

/**
 * Determines if a given string contains only letters
 * @param str - string to
 * @returns - wether a string is only letterrs
 */
public static onlyLetters(str: string): boolean;

/**
 * Returns the given string with first letter in upper case
 * @param str - input string
 * @returns - the resulting string
 */
public static upperFirst(str: string);

/**
 * Returns the given string with first letter in lower case
 * @param str - input string
 * @returns - resulting string
 */
public static lowerFirst(str: string);

/**
 * Detects if the first char of a given string is upper case
 * @param str
 */
public static isFirstUpper(str: string): boolean;

/**
 * Detects if the first char of a given string is upper case
 * @param str - input string
 * @returns {boolean}
 */
public static isFirstLower(str: string): boolean;

/**
 * Determines if the given string is in lower case
 * @param str - the string to test
 * @returns - {boolean}
 */
public static isLowerCase(str: string): boolean;

/**
 * Determines if the given string is in upper case
 * @param str - the string to test
 * @returns {boolean}
 */
public static isUpperCase(str: string): boolean;

/**
 * Checks whether a string contains an upper case
 * @param str
 * @returns {boolean}
 */
public static haveUpperCaseChar(str: string): boolean;

/**
 * Semi-smart method to convert to and from Snake/Cane and Pascal casing
 * and the other way around
 * @param data - input string
 * @param toLowerPascal - if set the result will be camel case
 */
public static invertCasing(data: string, toLowerPascal: boolean = false);

/**
 * Processes a given string and replaces char which is not a valid letter with
 * a given replacement char, only one fill char after an other will be included
 * 
 *   Example with "-" as fill char:
 *   Input: "#You___Could___  --> Be <-- Mine!!"
 *   Output: "You-Could-Be-Mine
 * 
 * @param data - input string
 * @param fillChar - 
 * @returns - resulting string
 */
public static unifyString(data: string, fillChar: string = "_", stripNoneLetters: boolean = false): string;

/**
 * Base method for converting from pascal to snake/dash case
 * @param data - input
 * @param dashCase - if set output will be dash case 
 * @returns - resulting string
 */
public static convertFromPascalCasing(data: string, dashCase: boolean = false): string;

Following methods are shaky

These are still in an early Beta stage, these methods will detect the input format and perform the conversion accordingly.

toDashCase
toPascalCase
toCamelCase

####Unit Testing Unit tests is available for the most of the methods :)