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How to model type-safe enum types?
...e WeekDay = Value
val Mon = Value("Mon")
val Tue = Value("Tue")
... etc
}
You get more sensible results:
WeekDay.valueOf("Sun") //returns Some(Sun)
WeekDay.Tue.toString //returns Tue
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Understanding ibeacon distancing
...asurement, you always get different results (because of noise, distortion, etc) and very often results form Gaussian distribution. There are two main parameters describing Gaussian curve:
mean (which is easy to understand, it's value for which peak of the curve occurs).
standard deviation, which s...
Get the current script file name
...ur url using different filers, like mysql_real_escape_string, stripslashes etc..
– Khandad Niazi
Jan 29 '14 at 15:43
...
What is the _snowman param in Ruby on Rails 3 forms for?
...result, it's extremely common for Ruby applications (and PHP applications, etc. etc.) to exhibit this user-facing bug, and therefore extremely common for users to try to change the encoding as a palliative measure.
All that said, when I wrote this patch, I didn't realize that the name of the parame...
What is the most effective way for float and double comparison?
...types.h doesn't compile on Windows, we cannot use
// uint32, uint64, and etc here.
typedef int Int;
typedef unsigned int UInt;
};
// The specialization for size 8.
template <>
class TypeWithSize<8> {
public:
#if GTEST_OS_WINDOWS
typedef __int64 Int;
typedef unsigned __int64 U...
What is the use of the @ symbol in PHP?
...erator). It makes PHP suppress any error messages (notice, warning, fatal, etc) generated by the associated expression. It works just like a unary operator, for example, it has a precedence and associativity. Below are some examples:
@echo 1 / 0;
// generates "Parse error: syntax error, unexpected ...
jQuery or CSS selector to select all IDs that start with some string [duplicate]
...don't know the type of html element? like it could be an input, or select, etc.
– And Wan
Jul 13 '17 at 14:44
@And Wan...
What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
...standard library support, debugger support (more tricks may be necessary), etc. With wide characters it's generally harder or impossible to get all of this, and you may get different pieces on different platforms.
One thing UTF-8 does not provide is the ability to use simple text algorithms such as...
Convert SVG image to PNG with PHP
...css">
#CA,#FL,HI{
fill:blue;
}
#Al, #NY, #NM{
fill:#cc6699;
}
/*etc..*/
</style>
and then you can do a single text replace to inject your css rules into the svg before proceeding with the imagick jpeg/png creation. If the colors don't change, check to make sure you don't have any ...
Where is the Java SDK folder in my computer? Ubuntu 12.04
... steps to get Java directory
Step 1:
$ whereis java
java: /usr/bin/java /etc/java /usr/share/java
That tells the command java resides in /usr/bin/java.
Dig again:
Step 2:
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2009-01-15 18:34 /usr/bin/java -> /etc/alternatives/java
So, now we k...