Data commit

Task/Ternary-logic/JavaScript/ternary-logic-1.js

@@ -0,0 +1,33 @@
+var L3 = new Object();
+
+L3.not = function(a) {
+  if (typeof a == "boolean") return !a;
+  if (a == undefined) return undefined;
+  throw("Invalid Ternary Expression.");
+}
+
+L3.and = function(a, b) {
+  if (typeof a == "boolean" && typeof b == "boolean") return a && b;
+  if ((a == true && b == undefined) || (a == undefined && b == true)) return undefined;
+  if ((a == false && b == undefined) || (a == undefined && b == false)) return false;
+  if (a == undefined && b == undefined) return undefined;
+  throw("Invalid Ternary Expression.");
+}
+
+L3.or = function(a, b) {
+  if (typeof a == "boolean" && typeof b == "boolean") return a || b;
+  if ((a == true && b == undefined) || (a == undefined && b == true)) return true;
+  if ((a == false && b == undefined) || (a == undefined && b == false)) return undefined;
+  if (a == undefined && b == undefined) return undefined;
+  throw("Invalid Ternary Expression.");
+}
+
+// A -> B is equivalent to -A or B
+L3.ifThen = function(a, b) {
+  return L3.or(L3.not(a), b);
+}
+
+// A <=> B is equivalent to (A -> B) and (B -> A)
+L3.iff = function(a, b) {
+  return L3.and(L3.ifThen(a, b), L3.ifThen(b, a));
+}

Task/Ternary-logic/JavaScript/ternary-logic-2.js

@@ -0,0 +1,10 @@
+L3.not(true)         // false
+L3.not(var a)        // undefined
+
+L3.and(true, a)      // undefined
+
+L3.or(a, 2 == 3)     // false
+
+L3.ifThen(true, a)   // undefined
+
+L3.iff(a, 2 == 2)    // undefined

Task/Ternary-logic/JavaScript/ternary-logic-3.js

@@ -0,0 +1,9 @@
+trit = {false: 'F', maybe: 'U', true: 'T'}
+nand    = (a, b) => (a == trit.false || b == trit.false) ? trit.true : (a == trit.maybe || b == trit.maybe) ? trit.maybe : trit.false
+not     = (a)    => nand(a, a)
+and     = (a, b) => not(nand(a, b))
+or      = (a, b) => nand(not(a), not(b))
+nor     = (a, b) => not(or(a, b))
+implies = (a, b) => nand(a, not(b))
+iff     = (a, b) => or(and(a, b), nor(a, b))
+xor     = (a, b) => not(iff(a, b))

Task/Ternary-logic/JavaScript/ternary-logic-4.js

@@ -0,0 +1,15 @@
+functor = {nand, and, or, nor, implies, iff, xor}
+display = {nand: '⊼', and: '∧', or: '∨', nor: '⊽', implies: '⇒', iff: '⇔', xor: '⊻', not: '¬'}
+values = Object.values(trit)
+
+log = 'NOT\n';
+for (let a of values) log += `${display.not}${a} = ${a}\n`
+
+log += '\nNAND         AND          OR           NOR          IMPLIES       IFF           XOR'
+for (let a of values) {
+    for (let b of values) {
+        log += "\n"
+        for (let op in functor) log += `${a} ${display[op]} ${b} = ${functor[op](a, b)}    `
+    }
+}
+console.log(log)

Task/Ternary-logic/JavaScript/ternary-logic-5.js

@@ -0,0 +1,15 @@
+NOT
+¬F = F
+¬U = U
+¬T = T
+
+NAND         AND          OR           NOR          IMPLIES       IFF           XOR
+F ⊼ F = T    F ∧ F = F    F ∨ F = F    F ⊽ F = T    F ⇒ F = T    F ⇔ F = T    F ⊻ F = F
+F ⊼ U = T    F ∧ U = F    F ∨ U = U    F ⊽ U = U    F ⇒ U = T    F ⇔ U = U    F ⊻ U = U
+F ⊼ T = T    F ∧ T = F    F ∨ T = T    F ⊽ T = F    F ⇒ T = T    F ⇔ T = F    F ⊻ T = T
+U ⊼ F = T    U ∧ F = F    U ∨ F = U    U ⊽ F = U    U ⇒ F = U    U ⇔ F = U    U ⊻ F = U
+U ⊼ U = U    U ∧ U = U    U ∨ U = U    U ⊽ U = U    U ⇒ U = U    U ⇔ U = U    U ⊻ U = U
+U ⊼ T = U    U ∧ T = U    U ∨ T = T    U ⊽ T = F    U ⇒ T = T    U ⇔ T = U    U ⊻ T = U
+T ⊼ F = T    T ∧ F = F    T ∨ F = T    T ⊽ F = F    T ⇒ F = F    T ⇔ F = F    T ⊻ F = T
+T ⊼ U = U    T ∧ U = U    T ∨ U = T    T ⊽ U = F    T ⇒ U = U    T ⇔ U = U    T ⊻ U = U
+T ⊼ T = F    T ∧ T = T    T ∨ T = T    T ⊽ T = F    T ⇒ T = T    T ⇔ T = T    T ⊻ T = F