Add a destroy method and update the readme

Author: jhubert

README

@@ -5,6 +5,11 @@ example usage:
 var db = SQLite({ shortName: 'mydb' });
 
 db.createTable('people', 'name TEXT, age INTEGER');
+
 db.insert('people', { name: 'Jeremy', age: 29 });
+
 db.update('people', { age: 30 }, { name: 'Jeremy' });
-db.select('people', '*', { age: 30 }, function (transaction, results) { var x; for(x=0; x<results.rows.length; x++) { console.log(results.rows.item(x)); } });
+
+db.select('people', '*', { age: 30 }, function (transaction, results) { var x; for(x=0; x<results.rows.length; x++) { console.log(results.rows.item(x)); } });
+
+db.destroy('people', { id: 1 });

sqlite.js

@@ -146,7 +146,32 @@ function SQLite(cfg) {
       query = query.replace('#col#', columns);
       query = query.replace('#cond#', matches);
 
-      console.log(query);
+      execute(query, null, data, error);
+    },
+    destroy: function (table, conditions, data, error) {
+      var query = 'DELETE FROM ' + table + '#c#;', matches = [], x;
+
+      if (typeof conditions === 'string') {
+        matches.push(conditions);
+      } else if (typeof conditions === 'number') {
+        matches.push("id=" + conditions);
+      } else if (typeof conditions === 'object') {
+        for (x in conditions) {
+          if (conditions.hasOwnProperty(x)) {
+            if (x.match(/^\d+$/)) {
+              matches.push(conditions[x]);
+            } else {
+              matches.push(x + '=' + conditions[x]);
+            }
+          }
+        }
+      }
+
+      if (matches.length > 0) {
+        matches = " WHERE " + matches.join(' AND ');
+      }
+
+      query = query.replace('#c#', matches);
 
       execute(query, null, data, error);
     }