How to print like printf in Python3?

In Python2, print was a keyword which introduced a statement: In Python3, print is a function which may be invoked: In both versions, % is an operator which requires a string on the left-hand side and a value or a tuple of values or a mapping object (like dict) on the right-hand side. So, your … Read more

Draw Circle using css alone [duplicate]

You could use a .before with a content with a unicode symbol for a circle (25CF). Expand snippet I suggest this as border-radius won’t work in IE8 and below (I recognize the fact that the suggestion is a bit mental).

What is a bitmask and a mask?

On the PHP documentation about JSON it mentions the word bitmask. Wikipedia has it defined as a mask. I don’t understand either bitmask or mask or how they are useful. Can some one explain these terms using layman’s terms and no jargon?

Join/Where with LINQ and Lambda

I find that if you’re familiar with SQL syntax, using the LINQ query syntax is much clearer, more natural, and makes it easier to spot errors: If you’re really stuck on using lambdas though, your syntax is quite a bit off. Here’s the same query, using the LINQ extension methods:

‘x’ and ‘y’ lengths differ ERROR when plotting

From the code you provided, Vehic_vol is not a column of VehicleData. If you enter in it returns Note that NULL and VehicleData$CITY_MPG have different lengths (use length() to verify that). Try this instead or

Categories R

Group by in LINQ

Absolutely – you basically want: Or as a non-query expression: Basically the contents of the group (when viewed as an IEnumerable<T>) is a sequence of whatever values were in the projection (p.car in this case) present for the given key. For more on how GroupBy works, see my Edulinq post on the topic. (I’ve renamed … Read more

TypeScript foreach return [duplicate]

The cleaner way would be to not use .forEach. It’s almost never needed if you’re using TypeScript or a modern version of JavaScript: If the code inside your loop doesn’t have any side-effects and you’re just checking for a condition on each item, you could also use a functional approach with .some:

mean() warning: argument is not numeric or logical: returning NA

From R 3.0.0 onwards mean(<data.frame>) is defunct (and passing a data.frame to mean will give the error you state) A data frame is a list of variables of the same number of rows with unique row names, given class “data.frame”. In your case, result has two variables (if your description is correct) . You could … Read more

Categories R