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Diffstat (limited to 'examples/geek2.c')
| -rw-r--r-- | examples/geek2.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/examples/geek2.c b/examples/geek2.c new file mode 100644 index 00000000..53688dd3 --- /dev/null +++ b/examples/geek2.c @@ -0,0 +1,122 @@ +#ifndef __cplusplus
+
+#include <stc/chash.h>
+#include <stc/cstring.h>
+
+declare_CMap_str(ss, CStr, cstr_destroy);
+declare_CSet_str(ss);
+
+int main()
+{
+ // Lets use an explicit type signature (which would
+ // be `CMap<String, String>` in this example).
+ CMap_ss book_reviews = cmap_init;
+ CSet_ss set = cset_init;
+ cset_ss_put(&set, "Hello");
+ cset_ss_put(&set, "You");
+ cset_ss_put(&set, "Tube");
+ c_foreach (i, cset_ss, set)
+ printf("%s ", i.item->key.str); puts("");
+
+ // Review some books.
+ cmap_ss_put(&book_reviews,
+ "Adventures of Huckleberry Finn",
+ cstr_make("My favorite book.")
+ );
+ cmap_ss_put(&book_reviews,
+ "Grimms' Fairy Tales",
+ cstr_make("Masterpiece.")
+ );
+ cmap_ss_put(&book_reviews,
+ "Pride and Prejudice",
+ cstr_make("Very enjoyable.")
+ );
+ cmap_ss_put(&book_reviews,
+ "The Adventures of Sherlock Holmes",
+ cstr_make("Eye lyked it alot.")
+ );
+
+ // Check for a specific one.
+ // When collections store owned values (String), they can still be
+ // queried using references (&str).
+ if (! cmap_ss_get(&book_reviews, "Les Misérables")) {
+ printf("We've got %zu reviews, but Les Misérables ain't one.\n",
+ book_reviews.size);
+ }
+
+ // oops, this review has a lot of spelling mistakes, let's delete it.
+ cmap_ss_erase(&book_reviews, "The Adventures of Sherlock Holmes");
+
+ // Look up the values associated with some keys.
+ const char* to_find[] = {"Pride and Prejudice", "Alice's Adventure in Wonderland", NULL};
+ for (const char** book = to_find; *book; ++book) {
+ CMapEntry_ss* review = cmap_ss_get(&book_reviews, *book);
+ if (review) printf("%s: %s\n", *book, review->value.str);
+ else printf("%s is unreviewed.\n", *book);
+ }
+
+ // Look up the value for a key (will panic if the key is not found).
+ printf("Review for Jane: %s\n", cmap_ss_get(&book_reviews, "Pride and Prejudice")->value.str);
+
+ // Iterate over everything.
+ c_foreach (i, cmap_ss, book_reviews) {
+ printf("- %s: \"%s\"\n", i.item->key.str, i.item->value.str);
+ }
+ cmap_ss_destroy(&book_reviews);
+}
+
+#else // ======================================================
+
+use std::collections::HashMap;
+
+// Type inference lets us omit an explicit type signature (which
+// would be `HashMap<String, String>` in this example).
+let mut book_reviews = HashMap::new();
+
+// Review some books.
+book_reviews.insert(
+ "Adventures of Huckleberry Finn".to_str(),
+ "My favorite book.".to_str(),
+);
+book_reviews.insert(
+ "Grimms' Fairy Tales".to_str(),
+ "Masterpiece.".to_str(),
+);
+book_reviews.insert(
+ "Pride and Prejudice".to_str(),
+ "Very enjoyable.".to_str(),
+);
+book_reviews.insert(
+ "The Adventures of Sherlock Holmes".to_str(),
+ "Eye lyked it alot.".to_str(),
+);
+
+// Check for a specific one.
+// When collections store owned values (String), they can still be
+// queried using references (&str).
+if !book_reviews.contains_key("Les Misérables") {
+ println!("We've got {} reviews, but Les Misérables ain't one.",
+ book_reviews.len());
+}
+
+// oops, this review has a lot of spelling mistakes, let's delete it.
+book_reviews.remove("The Adventures of Sherlock Holmes");
+
+// Look up the values associated with some keys.
+let to_find = ["Pride and Prejudice", "Alice's Adventure in Wonderland"];
+for &book in &to_find {
+ match book_reviews.get(book) {
+ Some(review) => println!("{}: {}", book, review),
+ None => println!("{} is unreviewed.", book)
+ }
+}
+
+// Look up the value for a key (will panic if the key is not found).
+println!("Review for Jane: {}", book_reviews["Pride and Prejudice"]);
+
+// Iterate over everything.
+for (book, review) in &book_reviews {
+ println!("{}: \"{}\"", book, review);
+}
+
+#endif
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