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How to track down a “double free or corruption” error
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If you're using glibc, you can set the MALLOC_CHECK_ environment variable to 2, this will cause glibc to use an error tolerant version of malloc, which will cause your program to abort at the point where the double free is do...
Setting the default Java character encoding
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Unfortunately, the file.encoding property has to be specified as the JVM starts up; by the time your main method is entered, the character encoding used by String.getBytes() and the default constructors of InputStreamReader and OutputStreamWriter has been permanently cached.
As E...
cartesian product in pandas
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If you have a key that is repeated for each row, then you can produce a cartesian product using merge (like you would in SQL).
from pandas import DataFrame, merge
df1 = DataFrame({'key':[1,1], 'col1':[1,2],'col2':[3,4]})
df2...
How to include *.so library in Android Studio?
...t location. E.g.,
project/
├──libs/
| └── *.jar <-- if your library has jar files, they go here
├──src/
└── main/
├── AndroidManifest.xml
├── java/
└── jniLibs/
├── arm64-v8a/ <-- ...
PHP regular expressions: No ending delimiter '^' found in
...+)$/";
Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the regex to /^\d+$/.
Example: http://ideone.com/Ec3zh
See also: PHP - Delimiters
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AndroidRuntime error: Parcel: unable to marshal value
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Your HashMap itself is serializable but is the Bottle class serializable? If not, it will not serialize and will throw errors at runtime.
Make the Bottle class implement the java.io.Serializable interface
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How to create an instance of anonymous class of abstract class in Kotlin?
...eyEvent : KeyEvent) {
// ...
}
As Peter Lamberg has pointed out - if the anonymous class is actually an implementation of a functional interface (i.e. not of an abstract class), SAM Conversions can be used to simplify this statement even further:
val keyListener = KeyAdapter { keyEvent -&g...
Convert array of strings to List
... adding each element to this List (which is no problem; I'm just wondering if there is a better solution for learning purposes)?
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How do I view all commits for a specific day?
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Thanks John Bartholomew!
The answer is to specify the time, e.g. git log --after="2013-11-12 00:00" --before="2013-11-12 23:59"
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Why do stacks typically grow downwards?
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Doesn't early-day memory have a way to notify its size and we have to calculate it manually?
– phuclv
Sep 28 '15 at 15:46
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