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Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
... which could be used to zip streams (this is illustrated in the tutorial Exploring Java8 Lambdas. Part 1 by Dhananjay Nene ). This function :
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Create an enum with string values
...cript 1.8 you can use string literal types to provide a reliable and safe experience for named string values (which is partially what enums are used for).
type Options = "hello" | "world";
var foo: Options;
foo = "hello"; // Okay
foo = "asdf"; // Error!
More : https://www.typescriptlang.org/doc...
Format floats with standard json module
... answered Sep 19 '09 at 2:48
Alex MartelliAlex Martelli
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curl json post request via terminal to a rails app
I'm trying to create a user on my rails app with a curl command from os x terminal. No matter how I format the data, the app returns a responses that non of my validations have passed.
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check if variable is dataframe
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Use isinstance, nothing else:
if isinstance(x, pd.DataFrame):
... # do something
PEP8 says explicitly that isinstance is the preferred way to check types
No: type(x) is pd.DataFrame
No: type(x) == pd.DataFrame
Yes: isinstance(x, pd.DataFrame)
And don't eve...
Deserializing JSON to .NET object using Newtonsoft (or LINQ to JSON maybe?)
I know there are a few posts about Newtonsoft so hopefully this isn't exactly a repeat...I'm trying to convert JSON data returned by Kazaa's API into a nice object of some kind
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
...want to process it but what if I want to define the functionality and the execution will be then, check below enhancement;
public class OptionalConsumer<T> implements Consumer<Optional<T>> {
private final Consumer<T> c;
private final Runnable r;
public OptionalConsumer(Cons...
How do I make python wait for a pressed key?
...wait for a key press.
Additional info:
in Python 3 raw_input() does not exist
In Python 2 input(prompt) is equivalent to eval(raw_input(prompt))
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What does “|=” mean? (pipe equal operator)
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@A.R.S.: I can't think of a counter-example in Java (maybe if j is volatile?), but I'll take your word for it.
– David Schwartz
Jan 12 '13 at 17:10
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Python memoising/deferred lookup property decorator
Recently I've gone through an existing code base containing many classes where instance attributes reflect values stored in a database. I've refactored a lot of these attributes to have their database lookups be deferred, ie. not be initialised in the constructor but only upon first read. These attr...