practice session

Author: Chris Bee

balancedParens/balancedParens.js

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+/*
+ * write a function that takes a string of text and returns true if
+ * the parentheses are balanced and false otherwise.
+ *
+ * Example:
+ *   balancedParens('(');  // false
+ *   balancedParens('()'); // true
+ *   balancedParens(')(');  // false
+ *   balancedParens('(())');  // true
+ *
+ * Step 2:
+ *   make your solution work for all types of brackets
+ *
+ * Example:
+ *  balancedParens('[](){}'); // true
+ *  balancedParens('[({})]');   // true
+ *  balancedParens('[(]{)}'); // false
+ *
+ * Step 3:
+ * ignore non-bracket characters
+ * balancedParens(' var wow  = { yo: thisIsAwesome() }'); // true
+ * balancedParens(' var hubble = function() { telescopes.awesome();'); // false
+ *
+ *
+ */
+var balancedParens = function(input){
+
+  var arr = [];
+  var pairs = {};
+  pairs["["] = "]";
+  pairs["{"] = "}";
+  pairs["("] = ")";
+
+  for (var i = 0; i < input.length; i++) {
+    if(input[i] === '[' || input[i] === '(' || input[i] === '{') {
+      arr.push(input[i]);
+    }
+    if(input[i] === ']' || input[i] === ')' || input[i] === '}') {
+      var val = arr.pop();
+      if(pairs[val] !== input[i]){
+        return false;
+      }
+    }
+  }
+
+  if (arr.length > 0) {
+    return false;
+  }
+
+  return true;
+
+};
+
+
+console.log(balancedParens('('));  // false
+console.log(balancedParens('()')); // true
+console.log(balancedParens(')('));  // false
+console.log(balancedParens('(())'));  // true
+

blackjack/blackjack.js

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+//Create a blackjack game
+
+/*
+Rules
+N players play against dealer
+Total of cards must be below 21 
+Goal is to beat dealer score without going over 21
+Players can hit or stand 
+Aces are special - 1 or 11
+
+
+Players
+- Dealer true
+- score 0
+- cards []
+- actions: hit(), stand()
+-- if bust, score = -1
+
+Deck
+- cards []
+- shuffle
+
+Game 
+- Players []
+- Start game, deal cards
+- End game, determine winner
+
+
+*/