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Which parts of Real World Haskell are now obsolete or considered bad practice?
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Main issue of RWH
It's old. RWH was written at a time version 6.8 of GHC was being used. 6.8 used base version 3.0.x.x. 6.10.1 already used 4.0.0.0, which introduced many changes. And that's just the jump from 6.8 to 6.10. The current version of GHC is 7.10. Monads have bee...
Linking R and Julia?
...ll not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest the time in learning Julia, though, I am curious what facilities there are for embedding Julia snipp...
Why shouldn't `'` be used to escape single quotes?
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In my case it was error when I tried to use quote in text Time's up!. There is was warning from Eslint.
To fix it I replaced quote with Time's up!. Result is as expected
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Google MAP API Uncaught TypeError: Cannot read property 'offsetWidth' of null
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This happens to me all the time when I forget to conditionalize my maps script. Adding: var mapExists = document.getElementById("map-canvas"); if(mapExists) { // script } makes it all better.
– Imperative
Aug 9 '1...
Create or write/append in text file
I have a website that every time a user logs in or logs out I save it to a text file.
7 Answers
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Vagrant stuck connection timeout retrying
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@ParrisVarney: Most of the time, this hang is caused by the bootloader waiting for an entry to be selected. This is done by sending it the enter key, which you can either do using the GUI, or by using vboxmanage which the command line interface for Vir...
Why is Github asking for username/password when following the instructions on screen and pushing a n
...cial answer to this:
If Git prompts you for a username and password every time you try to interact with GitHub, you're probably using the HTTPS clone URL for your repository.
Using an HTTPS remote URL has some advantages: it's easier to set up than SSH, and usually works through strict firewalls an...
Why java.util.Optional is not Serializable, how to serialize the object with such fields
...ften better to have whatever code sets that field apply some policy at the time it's set.
Sometimes people want to put Optional into collections, like List<Optional<X>> or Map<Key,Optional<Value>>. This too is usually a bad idea. It's often better to replace these usages of ...
Why is it bad style to `rescue Exception => e` in Ruby?
...al_cleanup
end
In the second case, critical cleanup will be called every time, whether or not an exception is thrown.
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How to access random item in list?
...mewhere. Note that it's pretty important not to create a new instance each time you need a random number. You should reuse the old instance to achieve uniformity in the generated numbers. You can have a static field somewhere (be careful about thread safety issues):
static Random rnd = new Random()...