[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[asfgit]

Github user asfgit closed the pull request at:

https://github.com/apache/incubator-hivemall/pull/110


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[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[takuti]

Github user takuti commented on a diff in the pull request:

https://github.com/apache/incubator-hivemall/pull/110#discussion_r135462565
  
--- Diff: core/src/main/java/hivemall/utils/lang/StringUtils.java ---
@@ -172,12 +172,17 @@ public static void clear(@Nonnull final StringBuilder 
buf) {
 
 public static String concat(@Nonnull final List list, @Nonnull 
final String sep) {
--- End diff --

done


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[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[takuti]

Github user takuti commented on a diff in the pull request:

https://github.com/apache/incubator-hivemall/pull/110#discussion_r135459734
  
--- Diff: core/src/main/java/hivemall/utils/lang/StringUtils.java ---
@@ -172,12 +172,17 @@ public static void clear(@Nonnull final StringBuilder 
buf) {
 
 public static String concat(@Nonnull final List list, @Nonnull 
final String sep) {
--- End diff --

okay, so I keep the update here


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[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[myui]

Github user myui commented on a diff in the pull request:

https://github.com/apache/incubator-hivemall/pull/110#discussion_r135458769
  
--- Diff: core/src/main/java/hivemall/utils/lang/StringUtils.java ---
@@ -172,12 +172,17 @@ public static void clear(@Nonnull final StringBuilder 
buf) {
 
 public static String concat(@Nonnull final List list, @Nonnull 
final String sep) {
--- End diff --

former is expected. 


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[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[takuti]

Github user takuti commented on a diff in the pull request:

https://github.com/apache/incubator-hivemall/pull/110#discussion_r135446415
  
--- Diff: core/src/main/java/hivemall/utils/lang/StringUtils.java ---
@@ -172,12 +172,17 @@ public static void clear(@Nonnull final StringBuilder 
buf) {
 
 public static String concat(@Nonnull final List list, @Nonnull 
final String sep) {
--- End diff --

@myui I guess you originally assumed this method behaves in a similar way 
to [what `org.apache.commons.lang3.StringUtils.join` 
does](https://github.com/apache/commons-lang/blob/1571050a196198f336ae487ee3b6df629d3ee9da/src/main/java/org/apache/commons/lang3/StringUtils.java#L4106-L4150).
 However, the original code appends a separator even at the end of result 
string as:

- expected: `concat(["a", "b", "c"], "-")` => `a-b-c`
- actual: `concat(["a", "b", "c"], "-")` => `a-b-c-`

So, I fixed the method in 796d388c36c520858b6e61deb34100cb9201e5fa. Is this 
okay? If my assumption was incorrect, I revert the modification and introduce 
alternative method `StringUtils.join()`.


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[GitHub] incubator-hivemall pull request #110: [HIVEMALL-142] Implement SingularizeUD...

[takuti]

GitHub user takuti opened a pull request:

https://github.com/apache/incubator-hivemall/pull/110

[HIVEMALL-142] Implement SingularizeUDF

## What changes were proposed in this pull request?

Implement `singularize(string word)` to obtain singular form of `word`.

The implementation referred the following third-party code:

- 
https://github.com/sundrio/sundrio/blob/95c2b11f7b842bdaa04f61e8e338aea60fb38f70/codegen/src/main/java/io/sundr/codegen/functions/Singularize.java
- 
https://github.com/clips/pattern/blob/3eef00481a4555331cf9a099308910d977f6fc22/pattern/text/en/inflect.py#L445-L623

## What type of PR is it?

Feature

## What is the Jira issue?

https://issues.apache.org/jira/browse/HIVEMALL-142

## How was this patch tested?

unit test & manual test on EMR

## How to use this feature?

as documented

## Checklist

- [x] Did you apply source code formatter, i.e., `mvn formatter:format`, 
for your commit?


You can merge this pull request into a Git repository by running:

$ git pull https://github.com/takuti/incubator-hivemall singularize

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/incubator-hivemall/pull/110.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #110


commit 796d388c36c520858b6e61deb34100cb9201e5fa
Author: Takuya Kitazawa 
Date:   2017-08-28T05:41:43Z

Fix StringUtils.concat() to remove tail unnecessary separator

commit b14ca0975ddc65f0b208ae16734e8f77fb0c126d
Author: Takuya Kitazawa 
Date:   2017-08-28T05:43:51Z

Implement SingularizeUDF




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