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--- daily:2021-06-16 [2021/06/16 19:12] – created chrisbolas
+++ daily:2021-06-16 [2021/06/16 21:13] (current) – [Heap] chrisbolas
@@ Line 3: / Line 3: @@
 ===== Heap =====
+[[https://en.wikipedia.org/wiki/IIf| IIf - Immediate If]] is a function used in visual basic that give a similar functionality to a ternary operator, however it has the fault of side effects where each expression will be ran and the return is decided by the testing expression.
+[[https://ruby-doc.org/docs/ruby-doc-bundle/Manual/man-1.4/syntax.html#and| Ruby `and` operator]] - low presedence can be made use of in a one line if statement to both set a value and break or next a loop. e.g.
+<code>
+def check_pegs(guesses, secrets)
+    hints = Array.new(4)
+    guesses.each_with_index do | g, i |
+        hints[i] = 'B' and next if g == secrets[i]
+        secrets.each_with_index do | s, j |
+            hints[j] = 'W' and break if g == s && hints[j].nil?
+        end
+    end
+    peg_count(hints)
+end
+</code>
+However this can be confusing as a standard && operator would set the value then next/break only if the statement after the if was
+[[https://streamofcoding.com/ruby-double-ampersand-or-and/| More explanation of the and vs &&]]
+[[https://www.techotopia.com/index.php/Ruby_Operator_Precedence| Ruby precedence list]]
+[[https://chrisarcand.com/null-coalescing-operators-and-rubys-conditional-assignments/| Cull Coalescing Operators in Ruby]]
+[[https://en.wikipedia.org/wiki/Null_coalescing_operator| Wiki - Null Coalescing Operators]]
+[[https://en.wikipedia.org/wiki/Memoization| Wiki - Memoization]]