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LINQ, Where() vs FindAll()
...y be used on List<T> instances (or instances of classes that inherit from it, of course).
Additionally, they differ in actual purpose. Where returns an instance of IEnumerable that is executed on-demand when the object is enumerated. FindAll returns a new List<T> that contains the reque...
Comma separator for numbers in R?
... if you have a vector this can go awry if the numebrs are quite different. From help "Numeric vectors are encoded with the minimum number of decimal places needed to display all the elements to at least the digits significant digits. However, if all the elements then have trailing zeroes, the number...
Convert a char to upper case using regular expressions (EditPad Pro)
...osite requirement though. I had to replace all uppercase attribute values (from probably '90s HTML) to lower case. Using \L$1\E worked.
– Ejaz
Feb 7 '16 at 14:27
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How to validate an email address in PHP
... // emailaddress is valid
}
P.S. A note on the regex pattern used above (from the PHP source). It looks like there is some copyright on it of Michael Rushton. As stated: "Feel free to use and redistribute this code. But please keep this copyright notice."
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Python string.join(list) on object array rather than string array
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(another) +1: coming from the Perl world this is the most common thing in the universe: join("sep", list) - and all elements of list get converted to their string representations. I've been really struggling to find a solution in python.
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Pushing a local branch up to GitHub
...arning: push.default is unset; its implicit value has changed in Git
2.0 from 'matching' to 'simple'. To squelch this message and maintain the traditional behavior, use:
git config --global push.default matching
To squelch this message and adopt the new behavior now, use:
git config...
What is a .pid file and what does it contain?
...ecause procfs interfaces are different on e.g. Solaris are quite different from that on Linux.
– Shnatsel
Aug 28 '13 at 15:05
3
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Use of Initializers vs Constructors in Java
... The above creates an immutable data structure that you can happily return from public methods and so on.
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php static function
...h the class, not an instance of the class. As such, $this is not available from a static context ($this isn't pointing to any object).
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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);
yield return GetOtherErrors();
yield return GetValidationErr...