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Return all enumerables with yield return at once; without looping through
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You could set up all the error sources like this (method names borrowed from Jon Skeet's answer).
private static IEnumerable<IEnumerable<ErrorInfo>> GetErrorSources(Card card)
{
yield return GetMoreErrors(card);
yi...
Specifically, what's dangerous about casting the result of malloc?
... returned will initially be in some register with all the significant bits set. Now the compiler say, "okay, how do I convert and int to a pointer". That's going to be either a sign extension or zero extension of the low order 32-bits that it has been told malloc "returns" by omitting the prototyp...
TSQL - Cast string to integer or return default value
...TE FUNCTION dbo.TryConvertInt(@Value varchar(18))
RETURNS int
AS
BEGIN
SET @Value = REPLACE(@Value, ',', '')
IF ISNUMERIC(@Value + 'e0') = 0 RETURN NULL
IF ( CHARINDEX('.', @Value) > 0 AND CONVERT(bigint, PARSENAME(@Value, 1)) <> 0 ) RETURN NULL
DECLARE @I bigint =
C...
The project type is not supported by this installation
Whenever I try to open a project (csproj) that's downloaded from the internet, most of the times, I get the
15 Answers
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Linear Regression and group by in R
...regression coefficient r^2:
## make fake data
library(data.table)
set.seed(1)
dat <- data.table(x=runif(100), y=runif(100), grp=rep(1:2,50))
##calculate the regression coefficient r^2
dat[,summary(lm(y~x))$r.squared,by=grp]
grp V1
1: 1 0.01465726
2: 2 ...
How can I add new keys to a dictionary?
...horter and can handle any object as key (as long it is hashable), and only sets one value, whereas the .update(key1=val1, key2=val2) is nicer if you want to set multiple values at the same time, as long as the keys are strings (since kwargs are converted to strings). dict.update can also take anothe...
What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
Let's make a list of answers where you post your excellent and favorite extension methods .
150 Answers
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Is jQuery “each()” function synchronous?
...early ALL JavaScript is synchronous. The only exceptions are AJAX, timers (setTimeout and setInterval), and HTML5 Web Workers.
Your problem is probably somewhere else in your code.
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Cartesian product of x and y array points into single array of 2D points
I have two numpy arrays that define the x and y axes of a grid. For example:
13 Answers
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What is the difference between
Can some one please describe the usage of the following characters which is used in ERB file:
7 Answers
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