Lazy Ruby - Jason Arhart

Transcript

August 1, 13

Problem Say we want to write a function that: •

Takes a collection Thursday, August 1, 13

Problem Say we want to write a function that: •

Takes a collection • Applies a function f to each element Thursday, August 1, 13

Problem Say we want to write a function that: •

Takes a collection • Applies a function f to each element • Selects the even numbers from the results Thursday, August 1, 13

Problem Say we want to write a function that: •

Takes a collection • Applies a function f to each element • Selects the even numbers from the results • Applies a function g to each of those Thursday, August 1, 13

Problem Say we want to write a function that: •

Takes a collection • Applies a function f to each element • Selects the even numbers from the results • Applies a function g to each of those • Returns those results Thursday, August 1, 13