added example to build schema from file

rueckstiess · rueckstiess · commit acaaeffd2f79 · 2016-01-27T22:57:23.000+11:00
file needs to be newline-delimited json format (like mongoexport produces).
diff --git a/examples/parse-from-file.js b/examples/parse-from-file.js
@@ -0,0 +1,30 @@
+var Schema = require('../lib/schema');
+var fs = require('fs');
+var es = require('event-stream');
+
+var ts = new Date();
+
+// create new schema object with fake namespace
+var schema = new Schema({
+  ns: 'perf.testing'
+});
+
+if (process.argv.length < 3) {
+  console.log('Usage: node parse-from-file.js <jsonfile>');
+} else {
+  fs.createReadStream(process.argv[2], {
+    flags: 'r'
+  })
+    .pipe(es.split()) // split file into individual json docs (one per line)
+    .pipe(es.parse()) // parse each doc
+    .pipe(schema.stream()) // comment out this line to skip schema parsing
+    .pipe(es.stringify()) // stringify result
+    .pipe(es.wait(function(err, res) { // assemble everything back together
+      if (err) {
+        throw err;
+      }
+      var dur = new Date() - ts;
+      console.log(res);
+      console.log('took ' + dur + 'ms.'); // log time it took to parse
+    }));
+}
