Data commit

Task/Arithmetic-evaluation/Sidef/arithmetic-evaluation-1.sidef

@@ -0,0 +1,56 @@
+func evalArithmeticExp(s) {
+
+    func evalExp(s) {
+
+        func operate(s, op) {
+           s.split(op).map{|c| Number(c) }.reduce(op)
+        }
+
+        func add(s) {
+            operate(s.sub(/^\+/,'').sub(/\++/,'+'), '+')
+        }
+
+        func subtract(s) {
+            s.gsub!(/(\+-|-\+)/,'-')
+
+            if (s ~~ /--/) {
+                return(add(s.sub(/--/,'+')))
+            }
+
+            var b = s.split('-')
+            b.len == 3 ? (-1*Number(b[1]) - Number(b[2]))
+                       : operate(s, '-')
+        }
+
+        s.gsub!(/[()]/,'').gsub!(/-\+/, '-')
+
+        var reM  = /\*/
+        var reMD = %r"(\d+\.?\d*\s*[*/]\s*[+-]?\d+\.?\d*)"
+
+        var reA  = /\d\+/
+        var reAS = /(-?\d+\.?\d*\s*[+-]\s*[+-]?\d+\.?\d*)/
+
+        while (var match = reMD.match(s)) {
+            match[0] ~~ reM
+                ? s.sub!(reMD, operate(match[0], '*').to_s)
+                : s.sub!(reMD, operate(match[0], '/').to_s)
+        }
+
+        while (var match = reAS.match(s)) {
+            match[0] ~~ reA
+                ? s.sub!(reAS,      add(match[0]).to_s)
+                : s.sub!(reAS, subtract(match[0]).to_s)
+        }
+
+        return s
+    }
+
+    var rePara = /(\([^\(\)]*\))/
+    s.split!.join!('').sub!(/^\+/,'')
+
+    while (var match = s.match(rePara)) {
+        s.sub!(rePara, evalExp(match[0]))
+    }
+
+    return Number(evalExp(s))
+}

Task/Arithmetic-evaluation/Sidef/arithmetic-evaluation-2.sidef

@@ -0,0 +1,13 @@
+for expr,res in [
+     ['2+3'                                      =>        5],
+     ['-4-3'                                     =>       -7],
+     ['-+2+3/4'                                  =>    -1.25],
+     ['2*3-4'                                    =>        2],
+     ['2*(3+4)+2/4'                              => 2/4 + 14],
+     ['2*-3--4+-0.25'                            =>    -2.25],
+     ['2 * (3 + (4 * 5 + (6 * 7) * 8) - 9) * 10' =>     7000],
+] { 
+    var num = evalArithmeticExp(expr)
+    assert_eq(num, res)
+    "%-45s == %10g\n".printf(expr, num)
+}