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-rw-r--r--d.html.markdown34
1 files changed, 18 insertions, 16 deletions
diff --git a/d.html.markdown b/d.html.markdown
index 80c1dc65..edb3bff5 100644
--- a/d.html.markdown
+++ b/d.html.markdown
@@ -53,15 +53,15 @@ void main() {
// For and while are nice, but in D-land we prefer 'foreach' loops.
// The '..' creates a continuous range, including the first value
// but excluding the last.
- foreach(i; 1..1_000_000) {
+ foreach(n; 1..1_000_000) {
if(n % 2 == 0)
- writeln(i);
+ writeln(n);
}
// There's also 'foreach_reverse' when you want to loop backwards.
- foreach_reverse(i; 1..int.max) {
+ foreach_reverse(n; 1..int.max) {
if(n % 2 == 1) {
- writeln(i);
+ writeln(n);
} else {
writeln("No!");
}
@@ -70,7 +70,7 @@ void main() {
```
We can define new types with `struct`, `class`, `union`, and `enum`. Structs and unions
-are passed to functions by value (i.e. copied) and classes are passed by reference. Futhermore,
+are passed to functions by value (i.e. copied) and classes are passed by reference. Furthermore,
we can use templates to parameterize all of these on both types and values!
```c
@@ -199,8 +199,8 @@ our getter and setter methods, and keep the clean syntax of
accessing members directly!
Other object-oriented goodies at our disposal
-include `interface`s, `abstract class`es,
-and `override`ing methods. D does inheritance just like Java:
+include interfaces, abstract classes,
+and overriding methods. D does inheritance just like Java:
Extend one class, implement as many interfaces as you please.
We've seen D's OOP facilities, but let's switch gears. D offers
@@ -218,7 +218,7 @@ void main() {
// from 1 to 100. Easy!
// Just pass lambda expressions as template parameters!
- // You can pass any old function you like, but lambdas are convenient here.
+ // You can pass any function you like, but lambdas are convenient here.
auto num = iota(1, 101).filter!(x => x % 2 == 0)
.map!(y => y ^^ 2)
.reduce!((a, b) => a + b);
@@ -228,7 +228,7 @@ void main() {
```
Notice how we got to build a nice Haskellian pipeline to compute num?
-That's thanks to a D innovation know as Uniform Function Call Syntax.
+That's thanks to a D innovation know as Uniform Function Call Syntax (UFCS).
With UFCS, we can choose whether to write a function call as a method
or free function call! Walter wrote a nice article on this
[here.](http://www.drdobbs.com/cpp/uniform-function-call-syntax/232700394)
@@ -238,21 +238,23 @@ is of some type A on any expression of type A as a method.
I like parallelism. Anyone else like parallelism? Sure you do. Let's do some!
```c
+// Let's say we want to populate a large array with the square root of all
+// consecutive integers starting from 1 (up until the size of the array), and we
+// want to do this concurrently taking advantage of as many cores as we have
+// available.
+
import std.stdio;
import std.parallelism : parallel;
import std.math : sqrt;
void main() {
- // We want take the square root every number in our array,
- // and take advantage of as many cores as we have available.
+ // Create your large array
auto arr = new double[1_000_000];
- // Use an index, and an array element by referece,
- // and just call parallel on the array!
+ // Use an index, access every array element by reference (because we're
+ // going to change each element) and just call parallel on the array!
foreach(i, ref elem; parallel(arr)) {
- ref = sqrt(i + 1.0);
+ elem = sqrt(i + 1.0);
}
}
-
-
```