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dss:workshop-01 [2019/08/15 15:15] eduard.staniloiu old revision restored (2019/08/14 15:19) |
dss:workshop-01 [2021/03/10 23:46] (current) eduard.staniloiu |
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| ====== Highschool workshop - Introduction to D ====== | ====== Highschool workshop - Introduction to D ====== | ||
| + | |||
| + | ===== Slides ===== | ||
| + | |||
| + | {{:dss:workshop-liceu.odp|Slides}} | ||
| ===== Exercises ===== | ===== Exercises ===== | ||
| Line 61: | Line 65: | ||
| ==== 5. Function templates ==== | ==== 5. Function templates ==== | ||
| - | <code D> | + | Write a simple templated function that computes the sum of the elements of an array. |
| - | T numbersSum(T)(T[] numbers) | + | Your function should be able to work on any numeric type. This is exactly what we demoed in the presentation. |
| - | { | + | |
| - | T sum; | + | |
| - | foreach(num; numbers) | + | |
| - | { | + | |
| - | sum += num; | + | |
| - | } | + | |
| - | return sum; | + | |
| - | } | + | |
| - | + | ||
| - | void main() | + | |
| - | { | + | |
| - | int[] arr = [1, 2, 3, 4, 5]; | + | |
| - | writeln(numbersSum!int(arr)); // 15 | + | |
| - | + | ||
| - | float[] arr2 = [1.0, 2.0, 3.0, 4.0, 5.0]; | + | |
| - | writeln(numbersSum!float(arr2)); // 15 | + | |
| - | } | + | |
| - | </code> | + | |
| - | <code D> | + | <note> |
| - | T numbersSum(T)(T[] numbers) | + | If you want to read more about D meta-programming, start with this introductory [[https://ocw.cs.pub.ro/courses/dss/laboratoare/02|hands-on]]. |
| - | if (is(T == int) || is(T == float)) | + | </note> |
| - | { | + | |
| - | T sum; | + | |
| - | foreach(num; numbers) | + | |
| - | { | + | |
| - | sum += num; | + | |
| - | } | + | |
| - | return sum; | + | |
| - | } | + | |
| - | </code> | + | |
| - | <code D> | ||
| - | import std.traits : isNumeric; | ||
| - | |||
| - | T numbersSum(T)(T[] numbers) | ||
| - | if (isNumeric!T) | ||
| - | { | ||
| - | T sum; | ||
| - | foreach(num; numbers) | ||
| - | { | ||
| - | sum += num; | ||
| - | } | ||
| - | return sum; | ||
| - | } | ||
| - | </code> | ||
