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Lambda function in list comprehensions
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The first one creates a single lambda function and calls it ten times.
The second one doesn't call the function. It creates 10 different lambda functions. It puts all of those in a list. To make it equivalent to the first you need:
[(lambda x: x*x)(x) for x in range(10)]
Or better...
What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
Let's make a list of answers where you post your excellent and favorite extension methods .
150 Answers
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Java equivalent to #region in C#
...he code types involved (constructors, imports etc.), but there's nothing quite like #region.
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How do I empty an array in JavaScript?
Is there a way to empty an array and if so possibly with .remove() ?
18 Answers
18
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git pushes with wrong user from terminal
I have an issue with git and my terminal.
20 Answers
20
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Should I store generated code in source control
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Saving it in source control is more trouble than it's worth.
You have to do a commit every time you do a build for it to be any value.
Generally we leave generated code( idl, jaxb stuff, etc) outside source control where I work ...
How to lose margin/padding in UITextView?
I have a UITextView in my iOS Application, which displays a large amount of text.
22 Answers
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What is the difference between “def” and “val” to define a function
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val even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = true
With def you can get new function on every call:
val test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -1049057402
test()
// Int = -1049057402 - same result
def test: () => Int = {
val...
How does free know how much to free?
...you can pass any kind of pointer you like as an argument to free, how does it know the size of the allocated memory to free? Whenever I pass a pointer to some function, I have to also pass the size (ie an array of 10 elements needs to receive 10 as a parameter to know the size of the array), but I d...
Elegant way to check for missing packages and install them?
I seem to be sharing a lot of code with coauthors these days. Many of them are novice/intermediate R users and don't realize that they have to install packages they don't already have.
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