Code cleanup.

Author: gkellogg

lib/context.js

@@ -98,7 +98,7 @@ api.process = ({activeCtx, localCtx, options}) => {
           'jsonld.UnsupportedVersion',
           {code: 'invalid @version value', context: ctx});
       }
-      if(activeCtx.processingMode && activeCtx.processingMode == 'json-ld-1.0') {
+      if(activeCtx.processingMode && activeCtx.processingMode === 'json-ld-1.0') {
         throw new JsonLdError(
           '@version: ' + ctx['@version'] + ' not compatible with ' + activeCtx.processingMode,
           'jsonld.ProcessingModeConflict',
@@ -334,7 +334,7 @@ api.createTermDefinition = (activeCtx, localCtx, term, defined) => {
       // indicate if this term may be used as a compact IRI prefix
       mapping._prefix = (!mapping._termHasColon &&
         id.match(/[:\/\?#\[\]@]$/) &&
-        (simpleTerm || !activeCtx.processingMode || activeCtx.processingMode == 'json-ld-1.0'));
+        (simpleTerm || !activeCtx.processingMode || activeCtx.processingMode === 'json-ld-1.0'));
     }
   }
 
@@ -866,10 +866,10 @@ api.getAllContexts = async (input, options) => {
  * @return boolean.
  */
  api.processingMode = (activeCtx, version) => {
-   if(version.toString() >= "1.1") {
+   if(version.toString() >= '1.1') {
      return activeCtx.processingMode && activeCtx.processingMode >= 'json-ld-' + version.toString();
    } else {
-     return !activeCtx.processingMode || activeCtx.processingMode == 'json-ld-1.0'
+     return !activeCtx.processingMode || activeCtx.processingMode === 'json-ld-1.0'
    }
  }
 

lib/frame.js

@@ -149,13 +149,13 @@ api.frame = (state, subjects, frame, parent, property = null) => {
       } else {
         subframe = frame['@graph'][0];
         if(!types.isObject(subframe)) {
-          subframe == {};
+          subframe = {};
         }
         recurse = !(id === '@merged' || id === '@default');
       }
 
       if(recurse) {
-        state.graphStack << state.graph;
+        state.graphStack.push(state.graph);
         state.graph = id;
         // recurse into graph
         api.frame(state, Object.keys(state.graphMap[id]).sort(), [subframe], output, '@graph');
@@ -398,7 +398,7 @@ function _filterSubject(state, subject, frame, flags) {
   for(const key in frame) {
     let matchThis = false;
     const nodeValues = util.getValues(subject, key);
-    const isEmpty = util.getValues(frame, key).length == 0;
+    const isEmpty = util.getValues(frame, key).length === 0;
 
     if(isKeyword(key)) {
       // skip non-@id and non-@type
@@ -431,7 +431,7 @@ function _filterSubject(state, subject, frame, flags) {
         } else {
           // match on a specific @type
           for(const type of frame['@type']) {
-            if(nodeValues.some(tt => tt == type)) {
+            if(nodeValues.some(tt => tt === type)) {
               return true;
             }
           }

lib/util.js

@@ -373,7 +373,7 @@ api.compareValues = (v1, v2) => {
  * @param a the first string.
  * @param b the second string.
  *
- * @return -1 if a < b, 1 if a > b, 0 if a == b.
+ * @return -1 if a < b, 1 if a > b, 0 if a === b.
  */
 api.compareShortestLeast = (a, b) => {
   if(a.length < b.length) {