jridgewell · February 20, 2018 21:54 · Feb 20, 2018 · Feb 13, 2018 · Feb 13, 2018 · Feb 13, 2018
diff --git a/private-fields-object.js b/private-fields-object.js
@@ -0,0 +1,11 @@
+function create() {
+  return {
+    private #data: '',
+    add(str) {
+      this.#data += str;
+    },
+    toString() {
+      return this.#data;
+    },
+  };
+}
diff --git a/_private-fields-faq.md b/_private-fields-faq.md
@@ -1,5 +1,9 @@
 # Fields with arbitrarily scoped privacy
 
+Info on private fields: http://2ality.com/2017/07/class-fields.html
+
+## Q&A
+
 * Why the prefix `#`?
   * You define keys and these keys additionally work completely differently from property keys.
 * Is the keyword `private` necessary?

diff --git a/friend-fields-oop.js b/friend-fields-oop.js
@@ -1,6 +1,8 @@
+// Can only be used within this scope
 private #data;
 
 class StringBuilder {
+  // Accessible within this scope
   #data = '';
   add(str) {
     this.#data += str;

diff --git a/_private-fields-faq.md b/_private-fields-faq.md
@@ -1,3 +1,5 @@
+# Fields with arbitrarily scoped privacy
+
 * Why the prefix `#`?
   * You define keys and these keys additionally work completely differently from property keys.
 * Is the keyword `private` necessary?

diff --git a/_private-fields-faq.md b/_private-fields-faq.md
@@ -1,4 +1,4 @@
 * Why the prefix `#`?
   * You define keys and these keys additionally work completely differently from property keys.
 * Is the keyword `private` necessary?
-  * It could be omitted, but I like the distinction between declaration and mention.
+  * It could be omitted (first mention declares), but I like the distinction between declaration and mention.
diff --git a/private-fields-faq.md → _private-fields-faq.md b/private-fields-faq.md → _private-fields-faq.md
diff --git a/friend-fields-oop.js b/friend-fields-oop.js
@@ -0,0 +1,12 @@
+private #data;
+
+class StringBuilder {
+  #data = '';
+  add(str) {
+    this.#data += str;
+  }
+}
+
+function toString(sb) {
+  return this.#data;
+}
diff --git a/private-fields-faq.md b/private-fields-faq.md
@@ -0,0 +1,4 @@
+* Why the prefix `#`?
+  * You define keys and these keys additionally work completely differently from property keys.
+* Is the keyword `private` necessary?
+  * It could be omitted, but I like the distinction between declaration and mention.
diff --git a/private-fields-fp.js b/private-fields-fp.js
@@ -0,0 +1,15 @@
+// Can only be used within this scope
+private #data;
+
+function create() {
+  return {
+    // Only accessible within this scope
+    #data: '',
+  };
+}
+function add(sb, str) {
+  sb.#data += str;
+}
+function toString(sb) {
+  return sb.#data;
+}
diff --git a/private-fields-oop.js b/private-fields-oop.js
@@ -0,0 +1,9 @@
+class StringBuilder {
+  private #data = '';
+  add(str) {
+    this.#data += str;
+  }
+  toString() {
+    return this.#data;
+  }
+}
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