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export function upperCaseFirstLetter(str: string): string {
    if (!str) return '';
    return str.charAt(0).toUpperCase() + str.slice(1);
}

export function upperCaseFirstLetters(str: string): string {
    if (!str) return '';
    return str.split(' ').map(word => upperCaseFirstLetter(word)).join(' ');
}

export function convertCamelCaseToPropertCase(str: string) {
    return str.replace(/([A-Z])/g, ' $1').replace(/^./, function(str){ return str.toUpperCase(); });
}

export function convertProperCaseToCamelCase(str: string) {
    return str.replace(/\s(.)/g, function($1) { return $1.toUpperCase(); }).replace(/\s/g, '').replace(/^./, function(str){ return str.toLowerCase(); });
}

export function convertDashToProperCase(str: string): string {
    if (!str) return '';
    return str.split('-').map(word => upperCaseFirstLetter(word)).join(' ');
}

^ | | some extra spacing

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