Lesson 24 of 55
8 mins readRanges & Lazy Iterators
In Plain English
Ranges represent sequences of numbers using minimal memory (O(1) storage). Learn UnitRange (1:10), StepRange (1:2:10), and LinRange for evenly spaced floats.
Deep Dive: How It Works
UnitRange: 1:10 stores only the start (1) and stop (10) numbers.
StepRange: 10:-2:0 creates a descending range with step -2.
LinRange: LinRange(0.0, 1.0, 5) generates 5 evenly spaced values from 0.0 to 1.0.
Iterators Module: Base.Iterators provides cycle, partition, flatten, and countfrom.
Core Rules to Remember
O(1) Memory Overhead: 1:1_000_000 occupies negligible memory until collected into an array.
LinRange for Numerical Grids: Ideal for plotting and discretizing continuous function domains.
Live Interactive Example
Hit Run Code to see it liveRange Types and LinRange
Python 3.12
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Output Console
Click "Run Code" to view the rendered output.
How it works: LinRange divides the interval [0.0, 1.0] into 5 points with spacing 0.25.
Your Turn: Micro Challenge
No pressure! Edit the starter code below and test your solution with instant feedback.
Micro Exercise
Generate LinRange and Collect
- Create `grid = LinRange(0, 10, 3)`.
- Print `"Points: $(collect(grid))"`.
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Sandbox Output
Click "Run & Check" to test your solution.
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