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What issues should be considered when overriding equals and hashCode in Java?
...
The theory (for the language lawyers and the mathematically inclined):
equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are not ...
Differences between Ant and Maven [closed]
...e build file
</description>
<!-- set global properties for this build -->
<property name="src" location="src/main/java"/>
<property name="build" location="target/classes"/>
<property name="dist" location="target"/>
<target name="init"&...
Why does overflow:hidden not work in a ?
... </tbody>
</table>
Fixed and fluid width columns
A width for the table must be set, but any extra width is simply taken by the fluid cell(s).
With multiple columns, fixed width and fluid width:
* {
box-sizing: border-box;
}
table {
table-layout: fixed;
border-collapse: co...
PDO Prepared Inserts multiple rows in single query
...=0, $separator=","){
$result = array();
if($count > 0){
for($x=0; $x<$count; $x++){
$result[] = $text;
}
}
return implode($separator, $result);
}
$pdo->beginTransaction(); // also helps speed up your inserts.
$insert_values = array();
foreach($d...
CSS table column autowidth
...d set
table tr ul.actions {margin: 0; white-space:nowrap;}
(or set this for the last TD as Sander suggested instead).
This forces the inline-LIs not to break. Unfortunately this does not lead to a new width calculation in the containing UL (and this parent TD), and therefore does not autosize th...
Using multiple property files (via PropertyPlaceholderConfigurer) in multiple projects/modules
...ntly writing an application which is split into multiple projects/modules. For example, let's take the following modules:
5...
Editing the git commit message in GitHub
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No, this is not directly possible. The hash for every Git commit is also calculated based on the commit message. When you change the commit message, you change the commit hash. If you want to push that commit, you have to force that push (git push -f). But if already s...
Embedding SVG into ReactJS
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Update 2016-05-27
As of React v15, support for SVG in React is (close to?) 100% parity with current browser support for SVG (source). You just need to apply some syntax transformations to make it JSX compatible, like you already have to do for HTML (class → classNam...
Polymorphism with gson
...eAdapter. And you certainly don't need to do instanceofs or write adapters for the derived classes: just one adapter for the base class or interface, provided of course that you are happy with the default serialization of the derived classes. Anyway, here's the code (package and imports removed) (al...
Spring .properties file: get element as an Array
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+1, just what I needed. Unfortunately reading comma-separated values into a List<String> in the same fashion doesn't seem to work (the list will have just one element).
– Jonik
May 29 '13 at 8:36
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