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What is the difference between “def” and “val” to define a function
...unction on every call:
val test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -1049057402
test()
// Int = -1049057402 - same result
def test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -240885810
test()
// Int = -1002157461 - ne...
How to make inline functions in C#
I'm using Linq To XML
6 Answers
6
...
How to calculate the SVG Path for an arc (of a circle)
...
Expanding on @wdebeaum's great answer, here's a method for generating an arced path:
function polarToCartesian(centerX, centerY, radius, angleInDegrees) {
var angleInRadians = (angleInDegrees-90) * Math.PI / 180.0;
r...
How to add texture to fill colors in ggplot2
... the online ggplot2 documentation but didn't see anything about adding textures to fill colors. Is there an official ggplot2 way to do this or does anyone have a hack that they use? By textures I mean things like diagonal bars, reverse diagonal bars, dot patterns, etc that would differentiate fi...
Swift make method parameter mutable?
...lare an inout parameter. Think: passing in a pointer.
func reduceToZero(_ x: inout Int) {
while (x != 0) {
x = x-1
}
}
var a = 3
reduceToZero(&a)
print(a) // will print '0'
This can be particularly useful in recursion.
Apple's inout declaration guidelines can be found h...
How to “properly” create a custom object in JavaScript?
... closure way. Both have advantages and drawbacks, and there are plenty of extended variations. Many programmers and libraries have different approaches and class-handling utility functions to paper over some of the uglier parts of the language.
The result is that in mixed company you will have a mi...
What is the difference between a 'closure' and a 'lambda'?
Could someone explain? I understand the basic concepts behind them but I often see them used interchangeably and I get confused.
...
Replace values in list using Python [duplicate]
...
Build a new list with a list comprehension:
new_items = [x if x % 2 else None for x in items]
You can modify the original list in-place if you want, but it doesn't actually save time:
items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for index, item in enumerate(items):
if not (ite...
What's the absurd function in Data.Void useful for?
...s the following signature, where Void is the logically uninhabited type exported by that package:
6 Answers
...
What makes Lisp macros so special?
...of using Lisp macros. As someone who wants to understand the buzz, please explain what makes this feature so powerful.
14 A...