A+B: Difference between revisions

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 =={{header|Lambdatalk}}==
 <lang scheme>
+Lambdatalk works in a wiki, lambdatank.
-) writing this lambdatalk code
-{center
-  Enter any sequence of numbers in the field below
-  {div
-   {@ contenteditable
-      style="box-shadow:0 0 8px #000;"
-      ondblclick="addme(this.innerHTML)"}}
-  and double-clic to display their sum.
-}
+) Open the wiki frame-editor and define a contenteditable box
-and this javascript code
+{def box
-{script
+ {pre
-  var addme = function(x) {
+  {@ contenteditable
-    alert( LAMBDATALK.eval_forms(
+     style="box-shadow:0 0 8px #000; padding:5px;"
-      "The sum of " + x + " is equal to {+ " + x + "}") )
+            ondblclick="this.innerHTML=LAMBDATALK.eval_forms(this.innerHTML)"
-  };
-}
+}}}
+-> blockedit
+) create this box
-displays an editable field in the wiki page
-_______________________________________________________________
+{box}
-   Enter any sequence of numbers in the editable field below
-                    [ 12 34 56           ]
-          and double-clic on it to display its sum.
-_______________________________________________________________
+   and close the wiki frame-editor. The wiki-page displays a shadowed box,
-The result is displayed in an alert box
+(here simulated as a space between square brackets)
-            "The sum of 12 34 56 is equal to 102"
+[                                                                    ]
+) Enter any valid lambdatalk expression, for instance
++2+3 is equal to {+ 1 2 3}
+then double-click. The expression is evaluated and the box displays
+[ 1+2+3 is equal to 6                                                ]
+Several boxes can be created in the wiki page
+with any valid lambdatalk expressions.
 </lang>