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Make column not nullable in a Laravel migration
...e doctrine/dbal
Then create a migration that will alter the table like so:
php artisan make:migration fix_whatever_table_name_here
public function up()
{
Schema::table('table_name', function (Blueprint $table) {
$table->type('column')->nullable(false)->change();
});
}
# pub...
PATH issue with pytest 'ImportError: No module named YadaYadaYada'
...est modules on test collection to gather custom hooks and fixtures, and in order to import the custom objects from them, pytest adds the parent directory of the conftest.py to the sys.path (in this case the repo directory).
Other project structures
If you have other project structure, place the co...
Multiple variables in a 'with' statement?
... differs from the standard nested with blocks. The managers are created in order before entering the with blocks: m1, m2, m3 = A(), B(), C() If B() or C() fails with exception, then your only hope of properly finalizing A() is the garbage collector.
– Rafał Dowgird
...
Can modules have properties the same way that objects can?
...
I would do this in order to properly inherit all the attributes of a module, and be correctly identified by isinstance()
import types
class MyModule(types.ModuleType):
@property
def y(self):
return 5
>>> a=MyModule(...
How to get a specific output iterating a hash in Ruby?
...ash.each do |key, array|
puts "#{key}-----"
puts array
end
Regarding order I should add, that in 1.8 the items will be iterated in random order (well, actually in an order defined by Fixnum's hashing function), while in 1.9 it will be iterated in the order of the literal.
...
Get last n lines of a file, similar to tail
... block_number = -1
blocks = [] # blocks of size BLOCK_SIZE, in reverse order starting
# from the end of the file
while lines_to_go > 0 and block_end_byte > 0:
if (block_end_byte - BLOCK_SIZE > 0):
# read the last block we haven't yet read
...
What is the combinatory logic equivalent of intuitionistic type theory?
... leave abstractions unbracketed when they're the last argument of a higher-order operator: you can see I did that with Pi. Your Agda type (x : S) -> T becomes Pi S \ x:S -> T.
(Digression. Type annotations on lambda are necessary if you want to be able to synthesize the type of abstractions. ...
How can I open multiple files using “with open” in Python?
...ption
If you are interested in the details, here is a generic example in order to explain how ExitStack operates:
from contextlib import ExitStack
class X:
num = 1
def __init__(self):
self.num = X.num
X.num += 1
def __repr__(self):
cls = type(self)
re...
Algorithm for creating a school timetable
...rties. It was extremely steep, one property easily able to change it by an order of magnitude up or down - and there were hundreds or thousands of properties in one organism. This resulted in absolutely HUGE numbers as the weights, and as a direct result, need to use a bignum library (gmp) to perfor...
what is the unsigned datatype?
... is more than one multiset per item); the type specifiers may occur in any order, possibly intermixed with the other declaration specifiers
— void
— char
— signed char
— unsigned char
— short, signed short, short int, or signed short int
— unsigned short, or unsigned short...