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What is “2's Complement”?
I'm in a computer systems course and have been struggling , in part, with Two's Complement . I want to understand it but everything I've read hasn't brought the picture together for me. I've read the wikipedia article and various other articles, including my text book .
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Explain the use of a bit vector for determining if all characters are unique
... here. @Dejel Here's the java data structure that you can use: docs.oracle.com/javase/7/docs/api/java/util/BitSet.html. Hopefully this helps someone traveling through the intertubes.
– nattyddubbs
Jan 20 '14 at 16:06
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How do I sort a Set to a List in Java?
...c arrays.
Instead, use something like this:
public static
<T extends Comparable<? super T>> List<T> asSortedList(Collection<T> c) {
List<T> list = new ArrayList<T>(c);
java.util.Collections.sort(list);
return list;
}
Here's a usage example:
Map<Inte...
How to use NULL or empty string in SQL
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according to @Bradc 's answer in this stackoverflow.com/questions/799584/…, better to use the first approach.
– Sameera R.
Feb 9 '16 at 5:30
add a com...
Ruby: How to get the first character of a string
How can I get the first character in a string using Ruby?
13 Answers
13
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Why aren't superclass __init__ methods automatically invoked?
...ribing the method resolution order in case of multiple inheritance: http://www.python.org/download/releases/2.3/mro/
If constructors were called automatically, you'd need another page of at least the same length explaining the order of that happening. That would be hell...
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Remove everything after a certain character
Is there a way to remove everything after a certain character or just choose everything up to that character? I'm getting the value from an href and up to the "?", and it's always going to be a different amount of characters.
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Get Slightly Lighter and Darker Color from UIColor
I was looking to be able to turn any UIColor into a gradient. The way I am intending to do this is by using Core Graphics to draw a gradient. What I am trying to do is to get a color, lets say:
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How do I get the row count of a pandas DataFrame?
I'm trying to get the number of rows of dataframe df with Pandas, and here is my code.
14 Answers
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How can I configure Logback to log different levels for a logger to different destinations?
...ppender">
<target>System.out</target>
<filter class="com.foo.StdOutFilter" />
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</appender>
<appender name="stderr" class="ch.qos.logback.core.ConsoleAppender">
<target>System.err</target>
<filter class="com.foo.ErrOutFilter" />
......