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Proper use of errors
...ve (1) intellisense and (2) better type-checking. Be aware though that any cast does not translate to JS at all and is purely syntactic sugar.
– Didii
Feb 16 '19 at 21:00
add ...
How do I use DateTime.TryParse with a Nullable?
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Why are you casting a DateTime to a DateTime? You don't need to recased d2 before passing it into the TryParse.
– Aaron Powell
Oct 31 '08 at 21:48
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Reshaping data.frame from wide to long format
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reshape() takes a while to get used to, just as melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
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Null or default comparison of generic argument in C#
...ype
Console.WriteLine("test".IsDefault());
// null must be cast to a type
Console.WriteLine(((String)null).IsDefault());
}
}
// The type cannot be generic
public static class TypeHelper
{
// I made the method generic instead
public static bool IsDefault<T>(...
How to convert an array into an object using stdClass() [duplicate]
...this solution json_decode(json_encode($clasa)) over just using (object) to cast the array into an object is that the latter doesn't do it recursively so any inner arrays remain arrays.
– racl101
Jan 21 '15 at 18:20
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Call static method with reflection
... your method signature is different from Action you could replace the type-casts and typeof from Action to any of the needed Action and Func generic types, or declare your Delegate and use it. My own implementation uses Func to pretty print objects:
static class PrettyPrinter {
static PrettyPr...
generate days from date range
...I had only scrolled down a bit more... sigh. Anyways, thank you. I added a CAST( <expression> AS DATE) to remove the time on my version. Also used where a.Date between GETDATE() - 365 AND GETDATE() ...if you run your query today it would give no rows if you dont notice the dates in the WHERE...
Weighted random numbers
...umber using gen, distributed according to dist
unsigned r = static_cast<unsigned>(dist(gen));
// Sanity check
assert(interval[0] <= r && r <= *(std::end(interval)-2));
// Save r for statistical test of distribution
avg[r - 1]++;
}
/...
comparing 2 strings alphabetically for sorting purposes
...erBool ? 1 : -1;
});
Note: Be careful for upper letters, you may need to cast your string to lower case due to your purpose.
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What is the purpose of std::make_pair vs the constructor of std::pair?
...from making the mistake of passing types o1 or o2 that can't implicitly be cast to T1 or T2. For instance passing a negative number to an unsigned int. -Wsign-conversion -Werror will not catch this error with std::pair constructor in c++11 however it will catch the error if std::make_pair is used.
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