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Regular Expression to get a string between parentheses in Javascript
...Each(x => {
const matches = [...x.matchAll(rx)];
console.log( Array.from(matches, m => m[0]) ); // All full match values
console.log( Array.from(matches, m => m[1]) ); // All Group 1 values
});
Legacy JavaScript code demo (ES5 compliant):
var strs = ["I expect five hundred d...
Apply a function to every row of a matrix or a data frame
...
(Here, the function applied normalizes every row to 1.)
Note: The result from the apply() had to be transposed using t() to get the same layout as the input matrix A.
A <- matrix(c(
0, 1, 1, 2,
0, 0, 1, 3,
0, 0, 1, 3
), nrow = 3, byrow = TRUE)
t(apply(A, 1, function(x) x / sum(x) ))
R...
How to use java.String.format in Scala?
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@ashes999 I'm from c# land aswell. I'm so used to numbered brackets I'd forgotton that wasn't the standard way of doing things. Seeing the percent signs brings it all back though!
– JonnyRaa
May 12 '...
In C#, how do I calculate someone's age based on a DateTime type birthday?
... it, but if you format the date to yyyymmdd and subtract the date of birth from the current date then drop the last 4 digits you've got the age :)
I don't know C#, but I believe this will work in any language.
20080814 - 19800703 = 280111
Drop the last 4 digits = 28.
C# Code:
int now = int.Pa...
ASP.NET MVC 3: Override “name” attribute with TextBoxFor
...eInfo.HtmlFieldPrefix in your Controller.
I learnt a lot about this stuff from Brad Wilson's blog.
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In C#, why is String a reference type that behaves like a value type?
... to this situation where we have a type with value sematics not inheriting from System.ValueType. Thanks Ben.)
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Avoid web.config inheritance in child web application using inheritInChildApplications
...hen I call the wcf service inside the "QA" folder, it takes the connection from parent config only (even I give <location> tag). Please let me know what would be the problem.
– superachu
Apr 30 '14 at 20:56
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Is it possible to set a number to NaN or infinity?
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Cast from string using float():
>>> float('NaN')
nan
>>> float('Inf')
inf
>>> -float('Inf')
-inf
>>> float('Inf') == float('Inf')
True
>>> float('Inf') == 1
False
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Declaring variables inside or outside of a loop
...lity.
Performance doesn't matter for today's compilers.(in this scenario)
From a maintenance perspective, 2nd option is better.
Declare and initialize variables in the same place, in the narrowest scope possible.
As Donald Ervin Knuth told:
"We should forget about small efficiencies, say about...
Java Generate Random Number Between Two Given Values [duplicate]
...ave tried that but it does not seem to work. I am using the random numbers from 0 to 100 (inclusive) to populate a multidimensional array; when trying this it populates the array with extremely large and extremely small numbers. For example, -3.76556749E8 3.0207573E8 2.033182079E9 -6.86227134E8.
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