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What is a Manifest in Scala and when do you need it?
...Scala 2.7.2 there is something called Manifest which is a workaround for Java's type erasure. But how does Manifest work exactly and why / when do you need to use it?
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Adding up BigDecimals using Streams
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Java standard library already have functions for summing integers/doubles like Collectors.summingInt(), but misses them for BigDecimals. Instead of writing reduce(blah blah blah) that is hard to read it would be better to wri...
GSON - Date format
...()
.setDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz").create();
or using java.text.DateFormat
Gson gson = new GsonBuilder()
.setDateFormat(DateFormat.FULL, DateFormat.FULL).create();
or do it with serializers:
I believe that formatters cannot produce timestamps, but this serializer/deserial...
Understanding generators in Python
...erator.
Normal functions return a single value using return, just like in Java. In Python, however, there is an alternative, called yield. Using yield anywhere in a function makes it a generator. Observe this code:
>>> def myGen(n):
... yield n
... yield n + 1
...
>>> g ...
Why is Double.MIN_VALUE in not negative
...his. I was porting some statistical analysis code and blindly translating java to C#. I noticed some numbers coming out at -infinity or NaN and took a closer look at the algorithm. I realized that double.MIN_VALUE made no sense in context and did a search. This post comes up before the java docs...
What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
In Java, we have Collections.emptyList() and Collections.EMPTY_LIST . Both have the same property:
4 Answers
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Disable HttpClient logging
...ur exactly setup.
Commons-Logging can log to log4j, but it can also log to java.util.logging (JDK1.4 logging)
Commons-Logging tries to be smart and guess which logging framework you are already using, and send its logs to that.
If you don't already have a logging framework, and are running on a JRE ...
Any way to declare an array in-line?
...nown as an anonymous array (as it has no name). searching "Anonymous array java" would've produced some results.
– Falaina
Jul 20 '09 at 14:55
2
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Array initializing in Scala
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scala> val arr = Array("Hello","World")
arr: Array[java.lang.String] = Array(Hello, World)
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How to permanently set $PATH on Linux/Unix? [closed]
...ide directories like /usr/local/something/bin to PATH variable or defining JAVA_HOME. Used by PAM and SystemD.
/etc/environment.d/*.conf List of unique assignments, allows references. Perfect for adding system-wide directories like /usr/local/something/bin to PATH variable or defining JAVA_HOME. Th...