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Easy pretty printing of floats in python?
...most exactly) this command you said you made up:
import numpy as np
np.set_printoptions(precision=2)
Or even better in your case if you still want to see all decimals of really precise numbers, but get rid of trailing zeros for example, use the formatting string %g:
np.set_printoptions(formatter...
Change all files and folders permissions of a directory to 644/755
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One approach could be using find:
for directories
find /desired_location -type d -print0 | xargs -0 chmod 0755
for files
find /desired_location -type f -print0 | xargs -0 chmod 0644
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How to apply bindValue method in LIMIT clause?
...I think this solves it.
$fetchPictures->bindValue(':skip', (int) trim($_GET['skip']), PDO::PARAM_INT);
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SPA best practices for authentication and session management
When building SPA style applications using frameworks like Angular, Ember, React, etc. what do people believe to be some best practices for authentication and session management? I can think of a couple of ways of considering approaching the problem.
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How can mixed data types (int, float, char, etc) be stored in an array?
...y elements a discriminated union, aka tagged union.
struct {
enum { is_int, is_float, is_char } type;
union {
int ival;
float fval;
char cval;
} val;
} my_array[10];
The type member is used to hold the choice of which member of the union is should be used for e...
How to get a variable name as a string in PHP?
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You could use get_defined_vars() to find the name of a variable that has the same value as the one you're trying to find the name of. Obviously this will not always work, since different variables often have the same values, but it's the only...
Benchmarking (python vs. c++ using BLAS) and (numpy)
....1
Dot product benchmark
Code:
import numpy as np
a = np.random.random_sample((size,size))
b = np.random.random_sample((size,size))
%timeit np.dot(a,b)
Results:
System | size = 1000 | size = 2000 | size = 3000 |
netlib BLAS | 1350 ms | 10900 ms | 39200 ms | ...
How to find where a method is defined at runtime?
... Fixnum(Perpetrator)#crime>
If you're on Ruby 1.9+, you can use source_location
require 'csv'
p CSV.new('string').method(:flock)
# => #<Method: CSV#flock>
CSV.new('string').method(:flock).source_location
# => ["/path/to/ruby/1.9.2-p290/lib/ruby/1.9.1/forwardable.rb", 180]
Note ...
How can I check if a Perl array contains a particular value?
...
Simply turn the array into a hash:
my %params = map { $_ => 1 } @badparams;
if(exists($params{$someparam})) { ... }
You can also add more (unique) params to the list:
$params{$newparam} = 1;
And later get a list of (unique) params back:
@badparams = keys %params;
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Can I zip more than two lists together in Scala?
...neLists[A](ss:List[A]*) = {
val sa = ss.reverse;
(sa.head.map(List(_)) /: sa.tail)(_.zip(_).map(p=>p._2 :: p._1))
}
For example:
combineLists(List(1, 2, 3), List(10,20), List(100, 200, 300))
// => List[List[Int]] = List(List(1, 10, 100), List(2, 20, 200))
The answer is truncated t...