Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Here is unit test with expectations:</p> <pre><code>import static java.util.Arrays.*; import static org.hamcrest.CoreMatchers.*; import static org.junit.Assert.*; import org.junit.Test; public class JoinerTest { private static final Converter&lt;Person, String&gt; PERSON_CONVERTER = new Converter&lt;Person, String&gt;() { @Override public String convert(Person object) { return object.getFirstName(); } }; @Test public void shouldPresentFirstNames() { // given Person person1 = new Person(); person1.setFirstName("foo"); Person person2 = new Person(); person2.setFirstName("bar"); Joiner&lt;Person&gt; joiner = new Joiner&lt;Person&gt;(", ", "\'"); // when String firstNames = joiner.join(PERSON_CONVERTER, asList(person1, person2)); // then assertThat(firstNames, is("\'foo\', \'bar\'")); } } </code></pre> <p>Converter is just an interface:</p> <pre><code>public interface Converter&lt;F, T&gt; { T convert(F object); } </code></pre> <p>And finally Joiner:</p> <pre><code>public class Joiner&lt;T&gt; { private final String delimiter; private final String quote; public Joiner(String delimiter, String quote) { this.delimiter = delimiter; this.quote = quote; } public String join(Converter&lt;T, String&gt; converter, Iterable&lt;T&gt; objects) { StringBuilder builder = new StringBuilder(); for (T object : objects) { String string = converter.convert(object); builder.append(quote); builder.append(string); builder.append(quote); builder.append(delimiter); } if (builder.length() &gt; 0) { builder.setLength(builder.length() - delimiter.length()); } return builder.toString(); } } </code></pre> <p>By using different converters it is easy to join properties of different types.</p>
    singulars
    1. This table or related slice is empty.
    1. POBest way to build a delimited string from a list in java
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USmorisil
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COOverengineering in my opinion.
      singulars
      1. PO
      1. USLluis Martinez
    2. COI would use guava's [Joiner](http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/base/Joiner.html) today
      singulars
      1. PO
      1. USmorisil
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload