Challenge 1 + 2

challenges/01-intro-challenges/answers.md

@@ -0,0 +1,9 @@
+DSLs found in [https://github.com/munificent/craftinginterpreters]
+----
+
+1. HTML
+2. Jinja2
+2. CSS
+3. SASS
+4. Markdown
+7. Makefile

challenges/01-intro-challenges/c-env/Makefile

@@ -0,0 +1,10 @@
+run: main
+	@ ./main
+
+main: main.c linked_list.o
+	@ gcc $^ -o main
+
+linked_list.o: linked_list.c
+	@ gcc -c linked_list.c
+
+

challenges/01-intro-challenges/c-env/linked_list.c

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+#include "malloc.h"
+#include "linked_list.h"
+
+List* InitList() {
+    List *new = (List *) malloc(sizeof(List));
+    new->head = NULL;
+    return new;
+}
+
+int Insert(List *l, char *data) {
+    Item *new = (Item *) malloc(sizeof(Item));
+    node->data = malloc(strlen(string) + 1);
+    strcpy(node->data, string);
+
+    if (l->head = NULL) {
+        new->next = new;
+        new->prev = new;
+        l->head = new;
+        return;
+    } else {
+        new->next = l->head;
+        new->prev = l->head->prev;
+        l->head->prev->next = new;
+        l->head->prev = new;
+        l->head = new;
+    }
+}
+
+Item* Find(List *l, char *data) {
+    if (l->head == NULL) {
+        return NULL;
+    }
+
+    Item *cur = l->head;
+    do {
+        if (strcmp(data, cur->data) == 0) {
+            return cur;
+        }
+
+        cur = cur->next;
+    } while (cur != l->head);
+
+    return NULL;
+}

challenges/01-intro-challenges/c-env/linked_list.h

@@ -0,0 +1,13 @@
+typedef struct _Item {
+    char *data;
+    struct _Item *prev;
+    struct _Item *next;
+} Item;
+
+typedef struct List {
+   Item *head;
+} List;
+
+List* InitList();
+void Insert(List *l, char *data);
+Item* Find(List *l, char *data);

challenges/01-intro-challenges/c-env/main.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include "linked_list.h"
+#include <assert.h>
+
+int main()
+{
+    List *l = InitList();
+
+    Insert(l, "one");
+    Insert(l, "two");
+    Insert(l, "three");
+
+    int f = Find(l, "two");
+    assert(f > 0);
+
+    int f = Find(l, "four");
+    assert(f == 0);
+}

challenges/01-intro-challenges/java-env/HelloWorld.java

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+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello World");
+    }
+}

challenges/01-intro-challenges/java-env/Makefile

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+run: HelloWorld.class
+	@ java HelloWorld
+
+HelloWorld.class: HelloWorld.java
+	@ javac $^
+
+.PHONY: run

challenges/02-map-territory-challenges/answers.md

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+1. Java (OpenJDK)
+  -> No Flex/Yacc used
+  -> Files:
+  	Scanner: [jdk/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/Scanner.java]
+	Parser:  [jdk/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java]
+  	[https://github.com/openjdk/jdk/blob/1f484dae4efaa60cf18a3d4df947c05f1497bd5b]
+
+2. Reasons not to JIT
+  - Short running programs => Cost of compilation higher than gained speed
+  - Little repeat execution of code
+  - Platform-independence
+
+3. Why do Lisps contain interpreters?
+  - Better interactivity
+  - Evaluation of Macros