augmented-string/src/index.ts

Extends String methods adding: - lcFirst(): string; - ucFirst(): string; - ucWords(): string; - toFloat(): number; - toInt(): number; - toCamel(): string; - toKebab(): string; - toPascal(): string; - toSnake(): string; - repeat(count): string;

declare global {
    interface String {
        lcFirst(): string;
        ucFirst(): string;
        ucWords(): string;
        toFloat(): number;
        toInt(): number;
        toCamel(): string;
        toKebab(): string;
        toPascal(): string;
        toSnake(): string;
        repeat(count: number): string;
    }
}
String.prototype.lcFirst = function(): string {
    return String(this)[0].toLowerCase() + String(this).slice(1);
};
String.prototype.ucFirst = function(): string {
    return String(this)[0].toUpperCase() + String(this).slice(1);
};
String.prototype.ucWords = function(): string {
    return String(this)
        .replace(/^([a-z])|\s+([a-z])/g, $1 => $1.toUpperCase())
    ;
};
String.prototype.toInt = function(): number {
    return parseInt(String(this), 10);
};
String.prototype.toFloat = function(): number {
    return parseFloat(String(this));
};
String.prototype.toCamel = function(): string {
    return String(this)
        .replace(/[-_]/g, ' ')
        .replace(/^\w|[A-Z]|\b\w/g, (word, index) => index ? word.toUpperCase() : word.toLowerCase() )
        .replace(/\s+/g, '')
    ;
};
String.prototype.toPascal = function(): string {
    return String(this)
        .replace(/[-_]/g, ' ')
        .replace(/^\w|[A-Z]|\b\w/g, (word) => ' ' + word)
        .replace(/^\w|[A-Z]|\b\w/g, (word) => word.toUpperCase())
        .replace(/\s/g, '')
    ;
};
String.prototype.toSnake = function(): string {
    return String(this)
        .replace(/[- ]/g, '_')
        .replace(/^\w|[A-Z]|\b\w/g, (word, index) => (index ? '_' : '') + word.toLowerCase())
        .replace(/_+/g, '_')
    ;
};
String.prototype.toKebab = function(): string {
    return String(this)
        .replace(/[_ ]/g, '-')
        .replace(/^\w|[A-Z]|\b\w/g, (word, index) => (index ? '-' : '') + word.toLowerCase())
        .replace(/-+/g, '-')
    ;
};
String.prototype.repeat = function(count: number): string {
    return String(
        (new Array(count + 1))
            .join(String(this))
    );
};

export {};