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How to delete SQLite database from Android programmatically
I would like to delete the database file from the Android file system programatically? Can I have a shell script launch adb which in turns runs a shell script in the Android space to do the database deletion? Can I get this done from within a JUnit test case (with a system() call)?
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Pandas selecting by label sometimes return Series, sometimes returns DataFrame
...andas, when I select a label that only has one entry in the index I get back a Series, but when I select an entry that has more then one entry I get back a data frame.
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std::unique_ptr with an incomplete type won't compile
...te <typename T>
foo::foo(T bar)
{
// Here the compiler needs to know how to
// destroy impl_ in case an exception is
// thrown !
}
At namespace scope, using unique_ptr will not work either:
class impl;
std::unique_ptr<impl> impl_;
since the compiler must know here how t...
Open files in 'rt' and 'wt' modes
...t exists
'b' binary mode
't' text mode (default)
'+' open a disk file for updating (reading and writing)
'U' universal newlines mode (deprecated)
The default mode is 'r' (open for reading text, synonym of 'rt').
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How do you set EditText to only accept numeric values in Android?
....3.3, it is "numberSigned". Just wrote it down here, in case someone is seeking for it :)
– Lemon Juice
Jan 23 '13 at 15:22
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How to map with index in Ruby?
...u're using ruby 1.8.7 or 1.9, you can use the fact that iterator methods like each_with_index, when called without a block, return an Enumerator object, which you can call Enumerable methods like map on. So you can do:
arr.each_with_index.map { |x,i| [x, i+2] }
In 1.8.6 you can do:
require 'enum...
How to return multiple objects from a Java method?
...the two objects instead.
You could return a List of NamedObject objects like this:
public class NamedObject<T> {
public final String name;
public final T object;
public NamedObject(String name, T object) {
this.name = name;
this.object = object;
}
}
Then you can easily ret...
in_array multiple values
How do I check for multiple values, such as:
6 Answers
6
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Best way to store time (hh:mm) in a database
... times in a database table but only need to store the hours and minutes.
I know I could just use DATETIME and ignore the other components of the date, but what's the best way to do this without storing more info than I actually need?
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When NOT to use yield (return) [duplicate]
...me into trouble, or otherwise should be avoided?
It's a good idea to think carefully about your use of "yield return" when dealing with recursively defined structures. For example, I often see this:
public static IEnumerable<T> PreorderTraversal<T>(Tree<T> root)
{
if (root =...