[issue#23] Fix output in '-a|--array' mode if one or more keys don't …

…exist in one or more of the array items.

CHANGES.md

@@ -2,7 +2,9 @@
 
 ## json 2.0.1 (not yet released)
 
-(nothing yet)
+- [issue#23] Fix output in '-a|--array' mode if one or more keys don't
+  exist in one or more of the array items.
+
 
 ## json 2.0.0
 

lib/jsontool.js

@@ -399,7 +399,7 @@ function lookupDatum(datum, lookup) {
 /**
  * Print out a single result, considering input options.
  */
-function printDatum(datum, opts, sep) {
+function printDatum(datum, opts, sep, alwaysPrintSep) {
   var output = null;
   switch (opts.outputMode) {
   case OM_INSPECT:
@@ -440,6 +440,8 @@ function printDatum(datum, opts, sep) {
   if (output && output.length) {
     emit(output);
     emit(sep);
+  } else if (alwaysPrintSep) {
+    emit(sep);
   }
 }
 
@@ -560,9 +562,9 @@ function main(argv) {
       results.forEach(function (row) {
         var c;
         for (c = 0; c < row.length-1; c++) {
-          printDatum(row[c], opts, opts.delim);
+          printDatum(row[c], opts, opts.delim, true);
         }
-        printDatum(row[c], opts, '\n');
+        printDatum(row[c], opts, '\n', true);
       });
     } else {
       if (lookups.length === 0) {
@@ -573,7 +575,7 @@ function main(argv) {
         }
       }
       results.forEach(function (r) {
-        printDatum(r, opts, '\n');
+        printDatum(r, opts, '\n', false);
       });
     }
   });

test/array-missing-keys/cmd

@@ -0,0 +1,6 @@
+JSON=../../lib/jsontool.js
+cat input | $JSON -a a
+echo ""
+cat input | $JSON -a a b
+echo ""
+cat input | $JSON -a a b -d,

test/array-missing-keys/expected.stdout

@@ -0,0 +1,8 @@
+1
+2
+
+1 
+2 3
+
+1,
+2,3

test/array-missing-keys/input

@@ -0,0 +1 @@
+[{"a":1}, {"a":2, "b":3}]