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4 Cards in this Set
- Front
- Back
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First-Class Function |
Functions can be computed, passed, stored, etc. wherever other values can be computed, passed, stored, etc
Can pass them to functions, return them from functions, put them in pairs, have them be part of the data a datatype constructor carries |
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Higher-Order Function |
Function that takes or returns other functions |
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Generic Types (also called Parametic Polymorphism)
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It lets functions take arguments of any type. It is a separate issue from first-class functions:
There are functions that take functions and do not have polymorphic types There are functions with polymorphic types that do not take functions. |
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Anonymous Function |
It is common to use anonymous functions as arguments to other functions.
Can put an anonymous function anywhere you can put an expression — it simply is a value, the function itself.
The only thing you cannot do with an anonymous function is recursion, exactly because you have no name to use for the recursive call
syntaxThe fn is a keyword and => (not =) is also part of the
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