Loops en enumerate

Nu je een for-loop hebt gebouwd die over een vector kan itereren, breiden we deze uit met de functie enumerate om zowel de index als de waarde van alles in de vector stock_tickers terug te geven.

Onthoud dat we voor elk element van stock_tickers de index willen printen, gevolgd door een spatie en daarna de waarde.

Deze oefening maakt deel uit van de cursus

Julia voor gevorderden

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Oefeninstructies

Gebruik enumerate om de bijbehorende index van elke waarde naar de console te printen.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Loop over stock_tickers printing the index and item
for (____, ____) in ____(stock_tickers)
	println(____, " ", ____)
end

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Deze oefening maakt deel uit van de cursus

Julia voor gevorderden

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Begin de cursus gratis

Loops are one of the core concepts that underpin Julia. In this chapter, you'll learn about for loops and while loops, and how to use them to iterate over data structures that you are already familiar with. You will also cover ranges, a useful tool for generating sequences of data.

Exercise 1: For-loops Exercise 2: Vraag over for-loops Exercise 3: Lus over een vector Exercise 4: Loops en enumerate

Huidige oefening

Exercise 5: Lussen over geneste structuren Exercise 6: While-loops Exercise 7: Een while-loop schrijven Exercise 8: While-lussen voor iteratie Exercise 9: Ranges Exercise 10: Ranges - iteratie Exercise 11: Reeksen definiëren Exercise 12: Itereren over reeksen Exercise 13: Splat-unpacking

This chapter focuses on expanding your knowledge of the data structures available in Julia. Learn how to use tuples, dictionaries, multi-dimensional arrays, and structures to store and traverse data quickly and efficiently.

Exercise 1: Tuples Exercise 2: When should you use a tuple?Exercise 3: Create, index, and slice a tuple Exercise 4: Create a NamedTuple for a person Exercise 5: Dictionaries Exercise 6: Create untyped dict, iterate Exercise 7: Create typed dict, iterate Exercise 8: Modify keys/values in dict, use get()Exercise 9: Multi-dimensional arrays Exercise 10: Create 1D and 2D arrays Exercise 11: Index and slice a 2D array Exercise 12: Array merging Exercise 13: Structs Exercise 14: Define a structure Exercise 15: Mutable and typed structs

In this chapter, you’ll extend your understanding of functions, exploring positional, keyword, and default function arguments. You will also cover code execution timing, getting a strong understanding of how to measure the time your code takes to run. This chapter will round off with a capstone on writing your own functions to solve real-world problems.

Exercise 1: Execution time and measurement Exercise 2: Built-in time macro Exercise 3: Timing a function Exercise 4: Positional and Default Arguments, Type Declarations Exercise 5: Positional arguments recap Exercise 6: Default arguments Exercise 7: Type declarations Exercise 8: Keyword Arguments Exercise 9: Keyword arguments Exercise 10: Variable number of arguments Exercise 11: Writing Your Own Function Exercise 12: Writing your own functions Exercise 13: Writing your own functions - structs

This final chapter will introduce anonymous functions and will recap one of the powerful features of Julia; multiple dispatch. You will learn how to use functions from Python and R packages within Julia and discover how to clean and modify data within dataframes.

Exercise 1: Anonymous Functions and Multiple Dispatch Exercise 2: Multiple dispatch Exercise 3: Anonymous functions Exercise 4: Filtering DataFrames Exercise 5: Importing Functions from Python and R Exercise 6: Importing Python and R Exercise 7: Python functions in Julia Exercise 8: R functions in Julia Exercise 9: Cleaning Data Exercise 10: Renaming columns Exercise 11: Missing data Exercise 12: Advanced missing data Exercise 13: Congratulations!