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C++ auto keyword. Why is it magic?
...learn C++, auto has always been a weird storage duration specifier that didn't serve any purpose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen to assign to it!
...
Why would iterating over a List be faster than indexing through it?
...complexity is effectively O(N^2) just to traverse the list!
If instead I did this:
for(String s: list) {
System.out.println(s);
}
then what happens is this:
head -> print head -> item1 -> print item1 -> item2 -> print item2 etc.
all in a single traversal, which is O(N).
No...
What's the difference between => , ()=>, and Unit=>
...
What it means is that what is passed is substituted for the value name inside the function. For example, take this function:
def f(x: => Int) = x * x
If I call it like this
var y = 0
f { y += 1; y }
Then the code will execute like this
{ y += 1; y } * { y += 1; y }
Though that raises th...
What is the difference between Elastic Beanstalk and CloudFormation for a .NET project?
...just a plain-text JSON file, I can stick it in my source control which provides a great way to version my application deployments. It also ensures that I have a repeatable, "known good" configuration that I can quickly deploy in a different region.
...
What is the difference between :first-child and :first-of-type?
...d regardless of its type
.parent div:nth-child(2) {
border: 1px black solid;
}
To see the complete example, please visit https://jsfiddle.net/bwLvyf3k/1/
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...ode (with an argument such as \n) will produce the first empty field. Consider if you had written '\n'.split('\n'), you would get two fields (one split, gives you two halves).
Question: Is there any specific reason for such a difference?
This first mode is useful when data is aligned in colu...
Can dplyr package be used for conditional mutating?
...3 <- BASE_fun(DF))
# user system elapsed
# 11.676 1.530 13.319
identical(as.data.frame(ans1), as.data.frame(ans2))
# [1] TRUE
identical(as.data.frame(ans1), as.data.frame(ans3))
# [1] TRUE
Not sure if this is an alternative you'd asked for, but I hope it helps.
...
Requirejs domReady plugin vs Jquery $(document).ready()?
...equireJS and need to initialize something on DOM ready. Now, RequireJS provides the domReady plugin , but we already have jQuery's $(document).ready() , which is available to me since I have required jQuery.
...
Differences between git remote update and fetch?
...rep --color=always -R -C30 fetch Documentation/RelNotes/* | less
Then I did a less search for --all, and this is what I found under the release notes for Git version 1.6.6:
git fetch learned --all and --multiple options, to run fetch from many repositories, and --prune option to remove remote ...
Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
...lta between layout position from iOS6 to iOS7.
In iOS7, some views can hide the status bar or have it transparent and, in effect, it is overlaid on top of your view. So if you put a UI element at (0.0, 0.0) on iOS6, it will appear below the status bar, but on iOS7 it would appear partially cover...