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Can I pass parameters by reference in Java?
...itself which is passed by value, hence it appears to be pass-by-reference (and people often claim that it is). This is not the case, as shown by the following:
Object o = "Hello";
mutate(o)
System.out.println(o);
private void mutate(Object o) { o = "Goodbye"; } //NOT THE SAME o!
Will print Hello...
PDO's query vs execute
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query runs a standard SQL statement and requires you to properly escape all data to avoid SQL Injections and other issues.
execute runs a prepared statement which allows you to bind parameters to avoid the need to escape or quote the param...
What's the difference between utf8_general_ci and utf8_unicode_ci?
Between utf8_general_ci and utf8_unicode_ci , are there any differences in terms of performance?
8 Answers
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Android java.lang.VerifyError?
In my Android app, I always get VerifyErrors! And I cannot figure out why. Whenever I include a external JAR, I always get VerifyErrors when I try to launch my app (except for once, when I included Apache Log4j.)
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What is reflection and why is it useful?
What is reflection, and why is it useful?
21 Answers
21
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How to find all duplicate from a List? [duplicate]
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In .NET framework 3.5 and above you can use Enumerable.GroupBy which returns an enumerable of enumerables of duplicate keys, and then filter out any of the enumerables that have a Count of <=1, then select their keys to get back down to a singl...
What is the purpose of the -m switch?
... command line (e.g., python <filename>). All python interpreters can convert modulenames to filenames by following same few, well-defined rules. These rules hinge on the sys.path variable. By altering this variable one can change how Python resolves modulenames into filenames (for more on how ...
How to force an entire layout View refresh?
...nflate(int, ViewGroup)).
The API doc reference is here: http://developer.android.com/reference/android/view/ContextThemeWrapper.html#setTheme%28int%29
Since the onDraw() method works on already instantiated Views, setTheme will not work. I have no experience with themes myself, but two alternativ...
The split() method in Java does not work on a dot (.) [duplicate]
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It works fine. Did you read the documentation? The string is converted to a regular expression.
. is the special character matching all input characters.
As with any regular expression special character, you escape with a \. You need an additional \ for the Java string escape.
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Where does Console.WriteLine go in ASP.NET?
...unning in WebSphere), when I use System.out.println() , my text goes to standard out, which is mapped to a file by the WebSphere admin console.
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