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How can a Java variable be different from itself?
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By the Java Language Specifications NaN is not equal to NaN.
Therefore any line that caused x to be equal to NaN would cause this, such as
double x=Math.sqrt(-1);
From the Java Language Specifications:
Floating-point ...
What is the Swift equivalent of -[NSObject description]?
...eflection capabilities to make your classes generate their own description by using this extension:
extension CustomStringConvertible {
var description : String {
var description: String = "\(type(of: self)){ "
let selfMirror = Mirror(reflecting: self)
for child in selfM...
Git Pull While Ignoring Local Changes?
...t thing ever. Git reset --hard done. Then git status: Your branch is ahead by 2 commits.
– Shailen
Mar 8 '13 at 15:19
23
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Android Bitmap to Base64 String
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use following method to convert bitmap to byte array:
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
to e...
Subversion stuck due to “previous operation has not finished”?
...hese operations are stored in the database file wc.db in the .svn folder.
By downloading SQLite to my checkout directory and running
sqlite3.exe .svn/wc.db "select * from work_queue"
you can get a list of all pending operations. These operations are the ones the error is referring to as "not fin...
pip issue installing almost any library
...me.
So I uninstalled the older pip and installed the newest version10.0.0 by entering this:
python3 -m pip uninstall pip setuptools
curl https://bootstrap.pypa.io/get-pip.py | python3
Now my problem was solved.
If you are using the python2, you can substitute the python3 with python. I hope it a...
HTML inside Twitter Bootstrap popover
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// Enables popover
$("[data-toggle=popover]").popover();
});
And by the way, you always need at least $("[data-toggle=popover]").popover(); to enable the popover. But in place of data-toggle="popover" you can also use id="my-popover" or class="my-popover". Just remember to enable them usin...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...99. From C99 §6.4.2.2/1:
The identifier __func__ is implicitly declared by the translator as if, immediately following the opening brace of each function definition, the declaration
static const char __func__[] = "function-name";
appeared, where function-name is the name of the lexically-enclosi...
Detect changed input text box
...ually far better than using keyup. E.g. IE lets the user clear input field by clicking an X which does not trigger keyup.
– Georg
Dec 29 '13 at 13:24
7
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How does Apple find dates, times and addresses in emails?
...erlink and it is possible to create an appointment or look at a map simply by tapping the link. It not only works for emails in English, but in other languages also. I love this feature and would like to understand how they do it.
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