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Accessing class variables from a list comprehension in the class definition
... in a module or in a function, but in classes, scoping is a little, uhm, strange.
This is documented in pep 227:
Names in class scope are not accessible. Names are resolved in
the innermost enclosing function scope. If a class definition
occurs in a chain of nested scopes, the res...
What’s the best RESTful method to return total number of items in an object?
...xity of accessing the actual data itself (by adding an envelope).
Content-Range
Content-Range: items 0-49/234
Promoted by a blog article named Range header, I choose you (for pagination)!. The author makes a strong case for using the Range and Content-Range headers for pagination. When we carefu...
Sort Go map values by keys
... in action has an excellent explanation.
When iterating over a map with a range loop, the iteration order is
not specified and is not guaranteed to be the same from one iteration
to the next. Since Go 1 the runtime randomizes map iteration order, as
programmers relied on the stable iteration order ...
How to iterate for loop in reverse order in swift?
...
Xcode 6 beta 4 added two functions to iterate on ranges with a step other than one:
stride(from: to: by:), which is used with exclusive ranges and stride(from: through: by:), which is used with inclusive ranges.
To iterate on a range in reverse order, they can be used as b...
Reverse Range in Swift
Is there a way to work with reverse ranges in Swift?
7 Answers
7
...
How to highlight cell if value duplicate in same column for google spreadsheet?
...1 (or change A to your chosen column)
Set the formatting style.
Ensure the range applies to your column (e.g., A1:A100).
Click Done
Anything written in the A1:A100 cells will be checked, and if there is a duplicate (occurs more than once) then it'll be coloured.
For locales using comma (,) as a d...
Test for equality among all elements of a single vector
... compares the min and the max, after dividing by the mean:
# Determine if range of vector is FP 0.
zero_range <- function(x, tol = .Machine$double.eps ^ 0.5) {
if (length(x) == 1) return(TRUE)
x <- range(x) / mean(x)
isTRUE(all.equal(x[1], x[2], tolerance = tol))
}
If you were using t...
Should it be “Arrange-Assert-Act-Assert”?
Regarding the classic test pattern of Arrange-Act-Assert , I frequently find myself adding a counter-assertion that precedes Act. This way I know that the passing assertion is really passing as the result of the action.
...
How do I check if a string contains another string in Swift?
...
print("exists")
}
Swift 3.0+
var string = "hello Swift"
if string.range(of:"Swift") != nil {
print("exists")
}
// alternative: not case sensitive
if string.lowercased().range(of:"swift") != nil {
print("exists")
}
Older Swift
var string = "hello Swift"
if string.rangeOfString(...
Is there a way to iterate over a range of integers?
Go's range can iterate over maps and slices, but I was wondering if there is a way to iterate over a range of numbers, something like this:
...