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How to extract epoch from LocalDate and LocalDateTime?
...ous without this information. However, the objects have several methods to convert them into date/time objects with timezones by passing a ZoneId instance.
LocalDate
LocalDate date = ...;
ZoneId zoneId = ZoneId.systemDefault(); // or: ZoneId.of("Europe/Oslo");
long epoch = date.atStartOfDay(zoneId...
How do I read an entire file into a std::string in C++?
... way is to flush the stream buffer into a separate memory stream, and then convert that to std::string:
std::string slurp(std::ifstream& in) {
std::ostringstream sstr;
sstr << in.rdbuf();
return sstr.str();
}
This is nicely concise. However, as noted in the question this per...
Associating enums with strings in C#
...lue))
throw new InvalidEnumArgumentException(
"value", Convert.ToInt32(value), type);
// Get the static field for the value.
FieldInfo fi = type.GetField(value.ToString(),
BindingFlags.Static | BindingFlags.Public);
// Get the description attribute, if ther...
Converting user input string to regular expression
I am designing a regular expression tester in HTML and JavaScript. The user will enter a regex, a string, and choose the function they want to test with (e.g. search, match, replace, etc.) via radio button and the program will display the results when that function is run with the specified argument...
Why does Boolean.ToString output “True” and not “true”
...en to an XML file, its
String.ToLower method should be
called first to convert it to
lowercase.
Here comes the fun fact #1: it doesn't return TrueString or FalseString at all. It uses hardcoded literals "True" and "False". Wouldn't do you any good if it used the fields, because they're marke...
How to download all files (but not HTML) from a website using wget?
...es:
wget --accept pdf,jpg --mirror --page-requisites --adjust-extension --convert-links --backup-converted --no-parent http://site/path/
This will mirror the site, but the files without jpg or pdf extension will be automatically removed.
...
Converting bytes to megabytes
I've seen three ways of doing conversion from bytes to megabytes:
9 Answers
9
...
How to convert std::string to NSString?
Hi I am trying to convert a standard std::string into an NSString but I'm not having much luck.
6 Answers
...
How to read data when some numbers contain commas as thousand separator?
...terpret it properly, but you can use gsub to replace "," with "", and then convert the string to numeric using as.numeric:
y <- c("1,200","20,000","100","12,111")
as.numeric(gsub(",", "", y))
# [1] 1200 20000 100 12111
This was also answered previously on R-Help (and in Q2 here).
Alternative...
Is the pImpl idiom really used in practice?
...Like above, it's pure overhead and is related with how real-life C++ build systems work.
Of course, recompilation is not needed when you just modify the implementation of the methods (because you don't touch the header), but that's on par with the standard header/implementation technique.
Is ...