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How to sort by two fields in Java?
... then by age.
String.compareTo "Compares two strings lexicographically" - from the docs.
Collections.sort is a static method in the native Collections library. It does the actual sorting, you just need to provide a Comparator which defines how two elements in your list should be compared: this is ...
Why are empty strings returned in split() results?
...er-joined records (such as csv file lines [[net of quoting issues]], lines from /etc/group in Unix, and so on), it allows (as @Roman's answer mentioned) easy checks for (e.g.) absolute vs relative paths (in file paths and URLs), and so forth.
Another way to look at it is that you shouldn't wantonly...
What is the canonical way to trim a string in Ruby without creating a new string?
...k changes the variable in place.
Hope this helps.
Update: This is output from irb to demonstrate:
>> @title = "abc"
=> "abc"
>> @title.strip!
=> nil
>> @title
=> "abc"
>> @title = " abc "
=> " abc "
>> @title.strip!
=> "abc"
>> @title
=> "abc"...
Building big, immutable objects without using constructors having long parameter lists
...ate the interfaces that it exposes to mutable and immutable. This is taken from the Swing library design.
public interface Foo {
X getX();
Y getY();
}
public interface MutableFoo extends Foo {
void setX(X x);
void setY(Y y);
}
public class FooImpl implements MutableFoo {...}
public SomeC...
Should I call Close() or Dispose() for stream objects?
...t assumes you can use a using block. I'm implementing a class that writes from time to time and therefore cannot.
– Jez
Dec 6 '14 at 15:08
5
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How to list only the file names that changed between two commits?
...s in the repo. I want to see a list of files changed between two commits - from SHA1 to SHA2.
13 Answers
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Accessing nested JavaScript objects and arays by string path
... using reduce is an excellent solution (one can also use _.reduce() from the underscore or lodash library)
– Alp
May 22 '14 at 14:51
4
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Should private helper methods be static if they can be static
...y the state of the object" -perfect explanation of how to differentiate it from a private method.
– HopeKing
Jun 26 '17 at 15:33
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Linux - Replacing spaces in the file names
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Note: This is run from WITHIN the directory whose files' names you want to update. Alternatively, you can change * to PATH_TO_YOUR_DIRECTORY.
– CFitz
Mar 8 '19 at 20:06
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How to detect a loop in a linked list?
...ial linked list is like this 1->2->3->4->5->2 (with a cycle from 5 to 2), then the reversed list looks like 1->2<-3<-4<-5 ? And if the reverse is that , the final reconstructed list will be screwed up ?
– Zenil
Mar 8 '15 at 1:08
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