Implement Index.fillna

[RainFung]

Implement Index.fillna via spark.DataFrame.fillna

[codecov-io]

Codecov Report

Merging #1102 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #1102      +/-   ##
=========================================
- Coverage   95.21%   95.2%   -0.02%     
=========================================
  Files          34      34              
  Lines        6896    6939      +43     
=========================================
+ Hits         6566    6606      +40     
- Misses        330     333       +3

Impacted Files	Coverage Δ
databricks/koalas/missing/indexes.py	100% <ø> (ø)	⬆️
databricks/koalas/indexes.py	96.29% <100%> (+0.09%)	⬆️
databricks/koalas/base.py	94.88% <0%> (-1.02%)	⬇️
databricks/koalas/missing/frame.py	100% <0%> (ø)	⬆️
databricks/koalas/frame.py	96.76% <0%> (+0.02%)	⬆️
databricks/koalas/series.py	96.5% <0%> (+0.04%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2b0014f...86da483. Read the comment docs.

[softagram-bot]

Softagram Impact Report for pull/1102 (head commit: 86da483)

⚠️ Copy paste found

ℹ️ indexes.py: Copy paste fragment inside the same file on lines 691, 967:

            raise NotImplementedError(
                \"Doesn't support symmetric_difference between Index & MultiIndex for now\")

        sdf_self = self._kdf._s...(truncated 477 chars)

ℹ️ test_indexes.py: Copy paste fragment on line 30 shared with ../test_dataframe.py:

    @property
    def pdf(self):
        return pd.DataFrame({
            'a': [1, 2, 3, 4, 5, 6, 7, 8, 9],
            'b': [4, 5, 6, 3, 2, 1, ...(truncated 160 chars)

ℹ️ test_indexes.py: Copy paste fragment on line 33 shared with ../test_dataframe.py, ../test_ops_on_diff_frames.py:

        return pd.DataFrame({
            'a': [1, 2, 3, 4, 5, 6, 7, 8, 9],
            'b': [4, 5, 6, 3, 2, 1, 0, 0, 0],
        }, index=[0, 1, 3, 5, 6, 8, 9, 9, 9])

    @propert...(truncated 20 chars)

ℹ️ indexes.py: Copy paste fragment inside the same file on lines 39, 128:

    flags = unsupported_property('flags', deprecated=True)

    # Functions
    append = unsupported_function('append')
    argmax = unsupporte...(truncated 500 chars)

Now that you are on the file, it would be easier to pay back some tech. debt.

⭐ Change Overview

(Open in Softagram Desktop for full details)

📄 Full report

• Permalink: Full report for pull/1102

Impact Report explained. Give feedback on this report to [email protected]

[ueshin]

LGTM.

[ueshin]

Thanks! merging.