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How to efficiently count the number of keys/properties of an object in JavaScript?
...).length worked best for me, because my return object is sometimes a plain string with no properties within it. _.size(obj) gives me back the length of the string, while _.keys(obj).length returns 0.
– Jacob Stamm
Nov 23 '15 at 23:02
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Using @property versus getters and setters
... to memorize, which is significantly less useful. Axioms could be used for extrapolation, and help you approach problems no one has seen yet. It's a shame that the property feature threatens to render the idea of Pythonic axioms nearly worthless. So all we're left with is a checklist.
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How to convert currentTimeMillis to a date in Java?
... = java.time.format.DateTimeFormatter.ofPattern("u-M-d hh:mm:ss a O");
var string = zonedDateTime.format(formatter);
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Static class initializer in PHP
...nswers (including this one), I prefer Victor Nicollet's answer. Simple. No extra coding required. No "advanced" coding to understand. (I recommend including FrancescoMM's comment, to make sure "init" will never execute twice.)
So I could have not bothered to write this answer. But so many people up...
rails - Devise - Handling - devise_error_messages
...gt;
<%= content_tag :div, msg, :id => "flash_#{name}" if msg.is_a?(String) %>
<% end %>
Try out this exact code and see if it makes any difference - the different ID attribute may help.
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How do I remove  from the beginning of a file?
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it translates to php as $string = preg_replace('/\x{EF}\x{BB}\x{BF}/','',$string); . before you use this, reconsider if you can't fix the problem at the source instead.
– commonpike
Oct 6 '11 at 15:53
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C++ sorting and keeping track of indexes
...mparator, or automatically reorder v in the sort_indexes function using an extra vector.
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Create Generic method constraining T to an Enum
... better implementation should be something like this:
public T GetEnumFromString<T>(string value) where T : struct, IConvertible
{
if (!typeof(T).IsEnum)
{
throw new ArgumentException("T must be an enumerated type");
}
//...
}
This will still permit passing of value type...
Print all but the first three columns
...me solutions:
(these solutions even preserve trailing spaces from original string)
$ echo -e ' 1 2\t \t3 4 5 6 7 \t 8\t ' |
awk -v n=3 '{ for ( i=1; i<=n; i++) { sub("^["FS"]*[^"FS"]+["FS"]+","",$0);} } 1 ' |
sed 's/ /./g;s/\t/->/g;s/^/"/;s/$/"/'
"4...5...6.7.->.8->."
$ e...
How do you Encrypt and Decrypt a PHP String?
...strlen() and mb_substr(), using the '8bit' character set mode to prevent mbstring.func_overload issues.
IVs should be generating using a CSPRNG; If you're using mcrypt_create_iv(), DO NOT USE MCRYPT_RAND!
Also check out random_compat.
Unless you're using an AEAD construct, ALWAYS encrypt then MAC...