correcting a bug with restructure

Author: Gmousse

README.md

@@ -1,6 +1,8 @@
 # dataframe-js
 **v1.0.0**
 
+![](https://travis-ci.org/Gmousse/dataframe-js.svg?branch=feature%2Fsql)
+
 ## Presentation
 
 dataframe-js provides another way to work with data in javascript (browser or server side) by using DataFrame, a data structure already used in some languages (Python, R, ...).

examples/titanic_analysis.js

@@ -138,10 +138,19 @@ DataFrame.fromCSV('http://vincentarelbundock.github.io/Rdatasets/csv/COUNT/titan
         // First we join our results.
         const ageEffect = survivalMeanByAge.innerJoin(survivalSDByAge, 'age');
         ageEffect.show();
-        // We now transpose the table (with columnNames);
-        const transposedAgeEffect = ageEffect.tranpose(true).rename('rowNames', '');
+        // We now remove age column (you will understand why in few lines) and transpose the table (with columnNames);
+        const transposedAgeEffect = ageEffect.drop('age').transpose(true);
         // It's magical, and it looks like that:
         transposedAgeEffect.show();
+        // Now we will use the previously removed age column as columnNames.
+        // Then we reorganize columns order.
+        transposedAgeEffect
+            .renameAll([...ageEffect.toArray('age'), '']).restructure(['', 'child', 'adults', 'yahou']).show()
+        const transposedAgeEffectWithColumnNames = transposedAgeEffect
+            .renameAll([...ageEffect.toArray('age'), ''])
+            .select('', 'child', 'adults');
+        // Which gives:
+        transposedAgeEffectWithColumnNames.show();
     }
 ).catch(err => {
     console.log(err);

src/dataframe.js

@@ -125,7 +125,7 @@ class DataFrame {
     }
 
     __newInstance__(data, columns) {
-        if (!arrayEqual(columns, this[__columns__]) || !(data[0] instanceof Row)) {
+        if (!arrayEqual(columns, this[__columns__], true) || !(data[0] instanceof Row)) {
             return new DataFrame(data, this._dropSpacesInColumnNames(columns), ...this.modules);
         }
         const newInstance = Object.assign(