up

Author: iliakan

6-binary/01-binary-intro/01-concat/_js.view/solution.js

@@ -0,0 +1,13 @@
+function makeCounter() {
+  let count = 0;
+
+  function counter() {
+    return count++;
+  }
+
+  counter.set = value => count = value;
+
+  counter.decrease = () => count--;
+
+  return counter;
+}

6-binary/01-binary-intro/01-concat/_js.view/source.js

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+function makeCounter() {
+  let count = 0;
+
+  // ... your code ...
+}
+
+let counter = makeCounter();
+
+alert( counter() ); // 0
+alert( counter() ); // 1
+
+counter.set(10); // set the new count
+
+alert( counter() ); // 10
+
+counter.decrease(); // decrease the count by 1
+
+alert( counter() ); // 10 (instead of 11)

6-binary/01-binary-intro/01-concat/_js.view/test.js

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+describe("counter", function() {
+
+  it("increases from call to call", function() {
+
+    let counter = makeCounter();
+
+    assert.equal( counter(), 0 ); 
+    assert.equal( counter(), 1 ); 
+    assert.equal( counter(), 2 ); 
+  });
+
+  
+  describe("counter.set", function() {
+    it("sets the count", function() {
+
+      let counter = makeCounter();
+
+      counter.set(10);
+
+      assert.equal( counter(), 10 ); 
+      assert.equal( counter(), 11 ); 
+    });
+  });
+  
+  describe("counter.decrease", function() {
+    it("decreases the count", function() {
+
+      let counter = makeCounter();
+
+      counter.set(10);
+
+      assert.equal( counter(), 10 ); 
+
+      counter.decrease();
+
+      assert.equal( counter(), 10 ); 
+
+    });
+  });
+
+});

6-binary/01-binary-intro/01-concat/solution.js

@@ -0,0 +1,13 @@
+function makeCounter() {
+  let count = 0;
+
+  function counter() {
+    return count++;
+  }
+
+  counter.set = value => count = value;
+
+  counter.decrease = () => count--;
+
+  return counter;
+}

6-binary/01-binary-intro/01-concat/source.js

@@ -0,0 +1,18 @@
+function makeCounter() {
+  let count = 0;
+
+  // ... your code ...
+}
+
+let counter = makeCounter();
+
+alert( counter() ); // 0
+alert( counter() ); // 1
+
+counter.set(10); // set the new count
+
+alert( counter() ); // 10
+
+counter.decrease(); // decrease the count by 1
+
+alert( counter() ); // 10 (instead of 11)

6-binary/01-binary-intro/01-concat/task.md

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+
+# Concatenate typed arrays
+
+Given multiple `chunks`, concatenate them into a single typed array.

6-binary/01-binary-intro/01-concat/test.js

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+describe("counter", function() {
+
+  it("increases from call to call", function() {
+
+    let counter = makeCounter();
+
+    assert.equal( counter(), 0 ); 
+    assert.equal( counter(), 1 ); 
+    assert.equal( counter(), 2 ); 
+  });
+
+  
+  describe("counter.set", function() {
+    it("sets the count", function() {
+
+      let counter = makeCounter();
+
+      counter.set(10);
+
+      assert.equal( counter(), 10 ); 
+      assert.equal( counter(), 11 ); 
+    });
+  });
+  
+  describe("counter.decrease", function() {
+    it("decreases the count", function() {
+
+      let counter = makeCounter();
+
+      counter.set(10);
+
+      assert.equal( counter(), 10 ); 
+
+      counter.decrease();
+
+      assert.equal( counter(), 10 ); 
+
+    });
+  });
+
+});