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Why does Stream not implement Iterable?
...s reusability, whereas Stream is something that can only be used once — more like an Iterator.
If Stream extended Iterable then existing code might be surprised when it receives an Iterable that throws an Exception the
second time they do for (element : iterable).
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Erratic hole type resolution
...atching on proofs provides a pretty nice Agda-like experience in Haskell. For example:
2 Answers
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How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONP
... to run a script in the path the file is not
found. When I cd to the directory holding the script the script runs. So what good is the
PYTHONPATH?
...
Difference between \A \z and ^ $ in Ruby regular expressions
...
If you're depending on the regular expression for validation, you always want to use \A and \z. ^ and $ will only match up until a newline character, which means they could use an email like me@example.com\n<script>dangerous_stuff();</script> and still have it...
Check element CSS display with JavaScript
Is it possible to check if an element's CSS display == block or none using JavaScript?
9 Answers
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What is the apply function in Scala?
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Wikipedia
apply serves the purpose of closing the gap between Object-Oriented and Functional paradigms in Scala. Every function in Scala can be represented as an object. Every function also has an OO type: for instance, a function that takes an Int parameter and returns an Int will have OO typ...
How to convert a boolean array to an int array
...ot even be necessary to do this, depending on what you're using the array for. Bool will be autopromoted to int in many cases, so you can add it to int arrays without having to explicitly convert it:
>>> x
array([ True, False, True], dtype=bool)
>>> x + [1, 2, 3]
array([2, 2, 4]...
git add, commit and push commands in one?
...lows you to pass it an argument. I have added the following to my .bashrc (or .bash_profile if Mac):
function lazygit() {
git add .
git commit -a -m "$1"
git push
}
This allows you to provide a commit message, such as
lazygit "My commit msg"
You could of course beef this up even m...
Parsing JSON Object in Java [duplicate]
...
I'm assuming you want to store the interestKeys in a list.
Using the org.json library:
JSONObject obj = new JSONObject("{interests : [{interestKey:Dogs}, {interestKey:Cats}]}");
List<String> list = new ArrayList<String>();
JSONArray arr...
Reload .profile in bash shell script (in unix)?
...on ? Because using the source command will run the file as a script... In worst cases, if somebody would use a variable assignment like MyVar="$foo$MyVar" in their bash_profile, then source ~/.profile would give the end result MyVar="$foo$MyVar$MyVar", hence $MyVar would have the wrong value afterwa...