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Why does Double.NaN==Double.NaN return false?
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139
NaN means "Not a Number".
Java Language Specification (JLS) Third Edition says:
An operati...
Which characters make a URL invalid?
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In general URIs as defined by RFC 3986 (see Section 2: Characters) may contain any of the following 84 characters:
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=
Note that this list doesn't state where in the URI ...
Complex CSS selector for parent of active child [duplicate]
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edited Aug 21 '12 at 3:49
answered Sep 5 '08 at 0:06
D...
Animate a custom Dialog
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ЯegDwight
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answered Apr 8 '11 at 7:23
ChrisJDChrisJD
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How to center icon and text in a android button with width set to “fill parent”
..."wrap_content"
android:layout_height="wrap_content"
android:minHeight="32dp"
android:minWidth="150dp"
android:gravity="center_horizontal|top" />
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Facebook share link without JavaScript
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13 Answers
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Regular expression for floating point numbers
...a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression:
[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)
See pkeller's answer for a fuller e...
What are the key differences between Scala and Groovy? [closed]
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230
They're both object oriented languages for the JVM that have lambdas and closures and interoper...
Differences between Proxy and Decorator Pattern
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edited Mar 2 at 23:21
answered Mar 1 at 19:21
jaco...
How to change app name per Gradle build type
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173
If by "app name", you mean android:label on <application>, the simplest solution is to hav...