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Why are functions in Ocaml/F# not recursive by default?
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One crucial reason for the explicit use of rec is to do with Hindley-Milner type inference, which underlies all staticly typed functional programming languages (albeit changed and extended in various ways).
If you have a def...
Using current time in UTC as default value in PostgreSQL
I have a column of the TIMESTAMP WITHOUT TIME ZONE type and would like to have that default to the current time in UTC. Getting the current time in UTC is easy:
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What is the current state of the art in HTML canvas JavaScript libraries and frameworks? [closed]
..., check out:
Demos (simple & complex, with code to show how they're done)
Fabric.js presentation at FalsyValues (and another one at BK.js)
Wiki on github (including FAQ)
Documentation
Google Group (ask any question there)
Fabric.js on twitter (or short questions via twitter)
Introduction to Fa...
Java: Get first item from a collection
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Honestly, performance-wise it might be slightly slower than c.iterator().next() - but the code is much clearer and simpler to modify.
– Carl
Nov 4 '09 at 4:14
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UITableView didSelectRowAtIndexPath: not being called on first tap
... the first tap because you are not deselecting anything. Once you selected one row, when you try to select a second one, the first gets deselected.
– The dude
Sep 4 '14 at 13:30
19...
Parse JSON String into a Particular Object Prototype in JavaScript
... not necessary.
Use JSON.parse('{"a":1}') to create a plain object.
Use one of the standardized functions to set the prototype:
Object.assign(new Foo, { a: 1 })
Object.setPrototypeOf({ a: 1 }, Foo.prototype)
share
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Check if string contains only whitespace
...f there are only whitespace characters in the string and there is at least one character, False otherwise.
A character is whitespace if in the Unicode character database (see unicodedata), either its general category is Zs (“Separator, space”), or its bidirectional class is one of WS, B, or S.
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Java List.add() UnsupportedOperationException
...cts to a List<String> instance but it throws an UnsupportedOperationException .
Does anyone know why?
7 Answers
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Hiding user input on terminal in Linux script
...en
echo
break
else
echo -n '*'
password+=$pass
fi
done
Without being fancy
echo "Please enter your username";
read username;
echo "Please enter your password";
stty -echo
read password;
stty echo
s...
How to train an artificial neural network to play Diablo 2 using visual input?
... games). I don't doubt of your skills and I'm also not saying it can't be done, but you can easily spend 10x more time working on recognizing stuff than implementing the ANN itself (assuming you already have experience with digital image processing techniques).
I think your idea is very interesting...