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Why does String.valueOf(null) throw a NullPointerException?
... that the most specific method is chosen.
A char[] is-an Object, but not all Object is-a char[]. Therefore, char[] is more specific than Object, and as specified by the Java language, the String.valueOf(char[]) overload is chosen in this case.
String.valueOf(char[]) expects the array to be non-nu...
Android ListView with different layouts for each row
...at you've described in comment I would suggest:
Storing views in object called ViewHolder. It would increase speed because you won't have to call findViewById() every time in getView method. See List14 in API demos.
Create one generic layout that will conform all combinations of properties and hid...
iOS Image Orientation has Strange Behavior
...erty. If the metadata specifies the orientation of the image which is generally ignored by other OS but Mac. Most of images taken are having their meta data property set to right angle. So Mac shows it 90 degree rotated manner. You can see the same image in proper way in windows OS.
For more detail...
Running Composer returns: “Could not open input file: composer.phar”
...
If you followed instructions like these:
https://getcomposer.org/doc/00-intro.md
Which tell you to do the following:
$ curl -sS https://getcomposer.org/installer | php
$ mv composer.phar /usr/local/bin/composer
Then it's likely that you, like me, ran those commands and didn't ...
Why does Popen.communicate() return b'hi\n' instead of 'hi'?
...code('ascii'))
hi
Of course, this specific example only works if you actually are receiving ASCII from the subprocess. If it's not ASCII, you'll get an exception:
>>> print(b'\xff'.decode('ascii'))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
Unic...
Copying files from host to Docker container
...nce: Docker CLI docs for cp
In Docker versions prior to 1.8 it was only possible to copy files from a container to the host. Not from the host to a container.
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How to copy text from Emacs to another application on Linux
... to M-w).
A system copy is what you typically get from pressing C-c (or choosing "Edit->Copy" in a application window).
An X copy is "physically" highlighting text with the mouse cursor.
An Emacs paste is the command yank (usually bound to C-y).
A system paste is what you typically get from press...
What is the proper declaration of main?
...rn type, and what does it mean to return a value from main ? What are the allowed parameter types, and what are their meanings?
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Just what is Java EE really? [closed]
...the libraries function outside of the application server environment?
Actually they can. Most of the libraries can be directly used standalone (in Java SE) or included in a .war (practically that's nearly always Tomcat). Some parts of Java EE, like JPA, have explicit sections in their respective sp...
What arguments are passed into AsyncTask?
...t exactly should I put, and where exactly will it go? Do I need to include all 3 or can I include 1,2,20?
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