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log4j logging hierarchy order
...are integer variables for proof docjar.com/html/api/org/apache/log4j/Level.java.html
– the.malkolm
Oct 13 '11 at 7:25
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Difference between a Seq and a List in Scala
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In Java terms, Scala's Seq would be Java's List, and Scala's List would be Java's LinkedList.
Note that Seq is a trait, which is equivalent to Java's interface, but with the equivalent of up-and-coming defender methods. Scala's...
C# version of java's synchronized keyword?
Does c# have its own version of the java "synchronized" keyword?
5 Answers
5
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What is a 'SAM type' in Java?
Reading up on the Java-8 spec, I keep seeing references to 'SAM types'. I haven't been able to find a clear explanation of what this is.
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Change date format in a Java string
..."));
System.out.println(newstring); // 2011-01-18
Or, when you're not on Java 8 yet, use SimpleDateFormat#parse() to parse a String in a certain pattern into a Date.
String oldstring = "2011-01-18 00:00:00.0";
Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S").parse(oldstring);
Use Simpl...
How do I get whole and fractional parts from double in JSP/Java?
How do I get whole and fractional parts from double in JSP/Java ? If the value is 3.25 then I want to get fractional =.25 , whole = 3
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Why would one declare a Java interface method as abstract?
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According to the Java Language Specification, the abstract keyword for interfaces is obsolete and should no longer be used. (Section 9.1.1.1)
That said, with Java's propensity for backwards compatibility, I really doubt it will ever make a d...
How to specify function types for void (not Void) methods in Java8?
I'm playing around with Java 8 to find out how functions as first class citizens. I have the following snippet:
4 Answers
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In Objective-C, what is the equivalent of Java's “instanceof” keyword?
...nable (cast-able) to a variable of another type (e.g. SpecifiedType ). In Java, I can write:
3 Answers
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Deep Learning（深度学习）学习笔记整理系列之（二） - 大数据 & AI - 清泛...
...就塞到这了）。
四、关于特征
特征是机器学习系统的原材料，对最终模型的影响是毋庸置疑的。如果数据被很好的表达成了特征，通常线性模型就能达到满意的精度。那对于特征，我们需要考虑什么呢？
4.1、特征表...