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What are the differences between numpy arrays and matrices? Which one should I use?
... here. Instead of performing fewer checks, using matrix*matrix requires an extra function call. So the advantage of using matrix is purely syntactic, not better performance.
– unutbu
Sep 18 '17 at 20:44
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What do people think of the fossil DVCS? [closed]
...h principles and continue them at its core as it gathers more layers (GUI, extra features).
I am impressed with Fossil and starting to use... take a look at fossil
cheers
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How to remove items from a list while iterating?
...could do reversed(list(enumerate(somelist))) if you don't mind creating an extra list in memory.
– drevicko
Aug 2 '15 at 23:27
2
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When should null values of Boolean be used?
...umn).
I see no reason to convert from boolean to Boolean as it introduces extra memory overhead, NPE possibility and less typing. Typically I use awkward BooleanUtils.isTrue() to make my life a little bit easier with Boolean.
The only reason for the existence of Boolean is the ability to have coll...
How to serialize SqlAlchemy result to JSON?
...(db.Integer, primary_key=True, auto_increment=True)
email = db.Column(db.String(200), unique=True)
@app.route('/users/')
def users():
users = User.query.all()
return jsonify(users)
if __name__ == "__main__":
users = User(email="user1@gmail.com"), User(email="user2@gmail.com")
db.crea...
How to use filter, map, and reduce in Python 3
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You do not need to create extra functions in list comprehensions. Just use [i*i*i for i in range(1,11)]
– Xiao
Jul 22 '14 at 3:25
2...
Easy way to turn JavaScript array into comma-separated list?
I have a one-dimensional array of strings in JavaScript that I'd like to turn into a comma-separated list. Is there a simple way in garden-variety JavaScript (or jQuery) to turn that into a comma-separated list? (I know how to iterate through the array and build the string myself by concatenation if...
Setting PayPal return URL and making it auto return?
...--------------------------------------------------------------
$product_id_string = $_POST['custom'];
$product_id_string = rtrim($product_id_string, ","); // remove last comma
// Explode the string, make it an array, then query all the prices out, add them up, and make sure they match the payment_gr...
What is the purpose of .PHONY in a Makefile?
...meaning: a) its behavior will not be altered if the file does exist and b) extra stat() will not be called.
Generally all targets in your Makefile which do not produce an output file with the same name as the target name should be PHONY. This typically includes all, install, clean, distclean, and s...
Spring CrudRepository findByInventoryIds(List inventoryIdList) - equivalent to IN clause
...); I get the error: Caused by: java.lang.NumberFormatException: For input string: "(1, 2)"
– user64141
Feb 14 '16 at 17:04
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