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What method in the String class returns only the first N characters?
...o string manipulations in C#, I miss the good old Left and Right functions from Visual Basic, which are much simpler to use than Substring.
So in most of my C# projects, I create extension methods for them:
public static class StringExtensions
{
public static string Left(this string str, int l...
Iterate through pairs of items in a Python list [duplicate]
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From itertools receipes:
from itertools import tee
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2, s3), ..."
a, b = tee(iterable)
next(b, None)
return zip(a, b)
for v, w in pairwise(a):
...
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Number of days in particular month of particular year?
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java.time.LocalDate
From Java 1.8, you can use the method lengthOfMonth on java.time.LocalDate:
LocalDate date = LocalDate.of(2010, 1, 19);
int days = date.lengthOfMonth();
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Eclipse Autocomplete (percent sign, in Juno)
...gines"). It is not only the bare usage statistics. So a value might change from 13% to 95% between some lines, depending what you did in between.
See the docs for details:
It assists developers by recommending him only those methods that are actually relevant for his task at hand. For instance,...
Run JavaScript when an element loses focus
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From w3schools.com: Made compatible with Firefox Sept, 2016
<input type="text" onfocusout="myFunction()">
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What is a segmentation fault?
...hat “does not belong to you.” It’s a helper mechanism that keeps you from corrupting the memory and introducing hard-to-debug memory bugs. Whenever you get a segfault you know you are doing something wrong with memory – accessing variable that has already been freed, writing to a read-only p...
Swift - Cast Int into enum:Int
I am very new to Swift (got started this week) and I'm migrating my app from Objective-C. I have basically the following code in Objective-C that works fine:
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When would you use the different git merge strategies?
From the man page on git-merge, there are a number of merge strategies you can use.
4 Answers
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Python: Append item to list N times
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Itertools repeat combined with list extend.
from itertools import repeat
l = []
l.extend(repeat(x, 100))
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Make sure that the controller has a parameterless public constructor error
...r all root types explicitly.
But of course, the configuration error comes from you adding the second constructor to your DbContext. Unity always tries to pick the constructor with the most arguments, but it has no idea how to resolve this particular constructor.
So the real cause is that you are t...