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Testing two JSON objects for equality ignoring child order in Java
...n which my quick read of their ObjectNode.equals() implementation suggests does the set membership comparison that you want:
public boolean equals(Object o)
{
if (o == this) return true;
if (o == null) return false;
if (o.getClass() != getClass()) {
return false;
}
Objec...
Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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What exactly is Arel in Rails 3.0?
...e a valid SQL query. Or, even worse, it is a valid SQL query, but one that doesn't make sense, or that does something totally different from what you think it does. This can never happen with ARel. (This is what the article I link to below means with "closed under composition".)
will objects/querie...
Defining a HTML template to append using JQuery
...ectively inert until activated. Essentially, your
markup is hidden DOM and does not render.
+Any content within a template won't have side effects. Scripts don't run, images don't load, audio doesn't play ...until the template is used.
+Content is considered not to be in the document. Using document...
MySQL “WITH” clause
.../
Below is my earlier answer, which I originally wrote in 2008.
MySQL 5.x does not support queries using the WITH syntax defined in SQL-99, also called Common Table Expressions.
This has been a feature request for MySQL since January 2006: http://bugs.mysql.com/bug.php?id=16244
Other RDBMS products...
HashMap to return default value for non-found keys?
...all Map#getOrDefault(...).
[Original]
There's no Map implementation that does this exactly but it would be trivial to implement your own by extending HashMap:
public class DefaultHashMap<K,V> extends HashMap<K,V> {
protected V defaultValue;
public DefaultHashMap(V defaultValue) {
...
Should I always use a parallel stream when possible?
...hing between sequential and parallel easy.
However, just because its easy, doesn't mean its always a good idea, and in fact, it is a bad idea to just drop .parallel() all over the place simply because you can.
First, note that parallelism offers no benefits other than the possibility of faster execu...
What is a .snk for?
... article "The Secrets of Strong Naming (archived at the Wayback Machine)". Does an excellent job of explaining these concepts in more detail. With pictures.
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embedding image in html email
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tried this first, it doesn't work for me for email. works fine for viewing in IE/Firefox, but not sent as email.
– tbone
Jul 15 '11 at 18:06
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How do I increase the cell width of the Jupyter/ipython notebook in my browser?
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100% doesn't look very nice, I changed it to 90%
– liang
Mar 30 '17 at 10:37
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