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How to split a delimited string in Ruby and convert it to an array?
...ning an array
of these substrings.
If pattern is a String, then its contents are used as the delimiter
when splitting str. If pattern is a single space, str is split on
whitespace, with leading whitespace and runs of contiguous whitespace
characters ignored.
If pattern is a Regm>ex m>p,...
How to compare variables to undefined, if I don’t know whether they m>ex m>ist? [duplicate]
...ed , you can check variable == undefined ; I know that, but how can you compare a value that you don’t know yet if it’s in memory?
...
Keep only date part when using pandas.to_datetime
I use pandas.to_datetime to parse the dates in my data. Pandas by default represents the dates with datetime64[ns] even though the dates are all daily only.
I wonder whether there is an elegant/clever way to convert the dates to datetime.date or datetime64[D] so that, when I write the data t...
Bidirectional 1 to 1 Dictionary in C#
I am looking for a generic, bidirectional 1 to 1 Dictionary class in C# (2), ie. a BiDictionaryOneToOne<T, S> which is guaranteed to only contain one of each value and key (up to RefEquals anyway), and which can be searched using either key or value. Anyone know of one, or should I just impl...
How to sort an ArrayList?
...(testList);
Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Here is the documentation for Collections.
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How do I update a Python package?
I'm running Ubuntu 9:10 and a package called M2Crypto is installed (version is 0.19.1). I need to download, build and install the latest version of the M2Crypto package (0.20.2).
...
Error to run Android Studio
...| grep -i jdk
If not, install JDK
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update && sudo apt-get install oracle-java8-installer
After the installation you have to enable the jdk
update-alternatives --display java
Check if Ubuntu uses Java JDK 8
java -version
If a...
Open a file with su/sudo inside Emacs
Suppose I want to open a file in an m>ex m>isting Emacs session using su or sudo , without dropping down to a shell and doing sudoedit or sudo emacs . One way to do this is
...
Postgres DB Size Command
What is the command to find the size of all the databases?
10 Answers
10
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Is it possible to create a File object from InputStream
...
You need to create new file and copy contents from InputStream to that file:
File file = //...
try(OutputStream outputStream = new FileOutputStream(file)){
IOUtils.copy(inputStream, outputStream);
} catch (FileNotFoundm>Ex m>ception e) {
// handle m>ex m>ception ...