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Filtering a list based on a list of booleans
...rue, False, True, False]
>>> %timeit list(compress(list_a, fil))
100000 loops, best of 3: 2.58 us per loop
>>> %timeit [i for (i, v) in zip(list_a, fil) if v] #winner
100000 loops, best of 3: 1.98 us per loop
>>> list_a = [1, 2, 4, 6]*100
>>> fil = [True, False,...
Remove element of a regular array
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204
If you don't want to use List:
var foos = new List<Foo>(array);
foos.RemoveAt(index);
re...
Position icons into circle
...
2020 solution
Here's a more modern solution I use these days.
I start off by generating the HTML starting from an array of images. Whether the HTML is generated using PHP, JS, some HTML preprocessor, whatever... this matters l...
JPA: How to have one-to-many relation of the same Entity type
... the relationship is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@ManyToOne
...
Heroku error: “Permission denied (public key)”
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edited Jul 15 '14 at 19:05
ElGavilan
5,42688 gold badges2323 silver badges3535 bronze badges
answered ...
How to use RSpec's should_raise with any kind of exception?
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380
expect { some_method }.to raise_error
RSpec 1 Syntax:
lambda { some_method }.should raise_err...
How to import existing *.sql files in PostgreSQL 8.4?
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edited Aug 3 '10 at 6:38
answered Aug 3 '10 at 6:16
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When do I use fabs and when is it sufficient to use std::abs?
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answered Jun 25 '10 at 13:06
Mike SeymourMike Seymour
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Execute AsyncTask several times
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Jun 16 '11 at 14:49
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