ruby - Function name followed by assignment operator -

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• what difference between def func(var) , def func=(var)? 3 answers

what following function definition mean? why there assignment operator in function name?

def func=(param)   @param = param end 

what following function definition mean?

they called writer method in ruby.

why there assignment operator in function name?

it adds sugar in syntax.

while have method as

def func=(param)   @param = param end 

you can call normal assignment

ob.func = 12 # same obj.func(12)