Hands-On Design Patterns and Best Practices with Julia

Using keyword arguments in constructors

We can always add new constructor functions to make it easier for creating objects. Using keyword arguments solves the following two problems:

• Code readability
• Ability to specify default values

Let's go ahead and define a new constructor as follows:

function TextStyle(;        font_family,        font_size,        font_weight = "Normal",        foreground_color = "black",        background_color = "white",         alignment = "left",        rotation = 0)    return TextStyle(        font_family,        font_size,        font_weight,        foreground_color,        background_color,        alignment,        rotation)end

Here, we have elected to provide default values for most of the fields except font_family and font_size. It is simply defined as a function that provides keyword arguments for all fields ...