get() possibility to provide params

lib/index.js

@@ -320,7 +320,15 @@ function get(valueObject, callback) {
     process.nextTick(() => {
       const allPromises = Object.keys(valueObject)
         .filter(func => ({}.hasOwnProperty.call(exports, func)))
-        .map(func => exports[func]());
+        .map(func => {
+          const params = valueObject[func].substring(valueObject[func].lastIndexOf('(') + 1, valueObject[func].lastIndexOf(')'));
+          const funcWithoutParams = func.split('(')[0];
+          if (params) {
+            return exports[funcWithoutParams](params)
+          } else {
+            return exports[funcWithoutParams]('')
+          }
+        });
 
       Promise.all(allPromises).then(data => {
         const result = {};
@@ -331,27 +339,31 @@ function get(valueObject, callback) {
               result[key] = data[i];
             } else {
               const keys = valueObject[key].replace(/,/g, ' ').replace(/ +/g, ' ').split(' ');
-              if (Array.isArray(data[i])) {
-                // result is in an array, go through all elements of array and pick only the right ones
-                const partialArray = [];
-                data[i].forEach(element => {
+              if (data[i]) {
+                if (Array.isArray(data[i])) {
+                  // result is in an array, go through all elements of array and pick only the right ones
+                  const partialArray = [];
+                  data[i].forEach(element => {
+                    const partialRes = {};
+                    keys.forEach(k => {
+                      if ({}.hasOwnProperty.call(element, k)) {
+                        partialRes[k] = element[k];
+                      }
+                    });
+                    partialArray.push(partialRes);
+                  });
+                  result[key] = partialArray;
+                } else {
                   const partialRes = {};
                   keys.forEach(k => {
-                    if ({}.hasOwnProperty.call(element, k)) {
-                      partialRes[k] = element[k];
+                    if ({}.hasOwnProperty.call(data[i], k)) {
+                      partialRes[k] = data[i][k];
                     }
                   });
-                  partialArray.push(partialRes);
-                });
-                result[key] = partialArray;
+                  result[key] = partialRes;
+                }
               } else {
-                const partialRes = {};
-                keys.forEach(k => {
-                  if ({}.hasOwnProperty.call(data[i], k)) {
-                    partialRes[k] = data[i][k];
-                  }
-                });
-                result[key] = partialRes;
+                result[key] = {};
               }
             }
             i++;

lib/util.js

@@ -490,7 +490,7 @@ function countLines(lines, startingWith) {
 }
 
 function sanitizeShellString(str) {
-  let result = str;
+  let result = str || '';
   result = result.replace(/>/g, '');
   result = result.replace(/</g, '');
   result = result.replace(/\*/g, '');