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Why does `True == False is False` evaluate to False? [duplicate]
I get some rather unexpected behavior on an expression that works with == but not with is :
4 Answers
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Select distinct using linq [duplicate]
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Using morelinq you can use DistinctBy:
myList.DistinctBy(x => x.id);
Otherwise, you can use a group:
myList.GroupBy(x => x.id)
.Select(g => g.First());
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How to print out all the elements of a List in Java?
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Here is some example about getting print out the list component:
public class ListExample {
public static void main(String[] args) {
List<Model> models = new ArrayList<>();
// TODO: First create your mode...
Entity Framework DateTime and UTC
... var properties = entity.GetType().GetProperties()
.Where(x => x.PropertyType == typeof(DateTime) || x.PropertyType == typeof(DateTime?));
foreach (var property in properties)
{
var attr = property.GetCustomAttribute<DateTimeKindAttribute>();
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Python: Making a beep noise
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interesting, it doesn't exists in my anaconda environment...is that weird?
– Charlie Parker
Jun 22 '16 at 20:16
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What is compiler, linker, loader?
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| Lexical Analyzer|
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| Syntax Analyzer |
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How do I get around type erasure on Scala? Or, why can't I get the type parameter of my collections?
... Java, did not get generics. This means that, at run time, only the class exists, not its type parameters. In the example, JVM knows it is handling a scala.collection.immutable.List, but not that this list is parameterized with Int.
Fortunately, there's a feature in Scala that lets you get around th...
How to plot two columns of a pandas data frame using points?
...u can specify the style of the plotted line when calling df.plot:
df.plot(x='col_name_1', y='col_name_2', style='o')
The style argument can also be a dict or list, e.g.:
import numpy as np
import pandas as pd
d = {'one' : np.random.rand(10),
'two' : np.random.rand(10)}
df = pd.DataFrame(d...
IntelliJ shortcut to show a popup of methods in a class that can be searched
...older versions) | File Structure Popup (Ctrl+F12 on Windows, ⌘+F12 on OS X). Start typing method/symbol name to either narrow down the list or highlight the desired element. Press Enter to navigate to the selected element.
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Replace a value in a data frame based on a conditional (`if`) statement
... what if you have multiple columns?
– geodex
Apr 19 '15 at 21:33
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