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String is immutable. What exactly is the meaning? [duplicate]
...d lost due to having no references.
Look at one more example below
String s1 = "java";
s1.concat(" rules");
System.out.println("s1 refers to "+s1); // Yes, s1 still refers to "java"
What's happening:
The first line is pretty straightforward: create a new String "java" and refer s1 to it.
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Sort ArrayList of custom Objects by property
...(studList, new Comparator<Student>(){
public int compare(Student s1, Student s2) {
return s1.getFirstName().compareToIgnoreCase(s2.getFirstName());
}
});
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What is the difference between == and equals() in Java?
...al will be added to something called the String constant pool, e.g. String s1 = "someString"; String s2 = "someString;" both s1 & s2 will share the same reference. s1 == s2 will return true. But if they were constructed via the String constructor, e.g. String s1 = new String("someString"); Stri...
What are enums and why are they useful?
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sleskesleske
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PHP - iterate on string characters
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You can also just access $s1 like an array, if you only need to access it:
$s1 = "hello world";
echo $s1[0]; // -> h
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Best way to find the intersection of multiple sets?
...n use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expansion
Note that set.intersection is not a static method, but this uses the functional notation to apply...
Returning null as an int permitted with ternary operator but not if statement
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VladVlad
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What is the formal difference in Scala between braces and parentheses, and when should they be used?
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Itchydon
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answered Dec 8 '10 at 11:55
Daniel C. SobralDaniel C. Sobral
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...xa1\xef\xbd\xa5\xcf\x89\xef\xbd\xa5\xef\xbd\xa1)\xef\xbe\x89'
>>> s1 = s.decode('utf-8')
>>> print s1
(｡･ω･｡)ﾉ
>>>
On my terminal the example works with the above, but if I get rid of the LANG setting then it won't work
$ unset LANG
$ python
Python 2.7.3 (de...
How to shift a column in Pandas DataFrame
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Kay WittigKay Wittig
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