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Django. Override save for model
... Or put whole logic in here
small = rescale_image(self.image,width=100,height=100)
self.image_small=SimpleUploadedFile(name,small_pic)
def get_image(self):
return self._image
image = property(get_image, set_image)
# this is not needed if small_image is created ...
Cannot delete or update a parent row: a foreign key constraint fails
...
110
As is, you must delete the row out of the advertisers table before you can delete the row in th...
Test for existence of nested JavaScript object key
... value of nested properties, otherwise will return undefined.
UPDATE 2019-10-17:
The optional chaining proposal reached Stage 3 on the ECMAScript committee process, this will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const valu...
Best way to allow plugins for a PHP application
...lobserver.php
– John Carter
Feb 25 '10 at 14:47
20
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Absolute vs relative URLs
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answered Jan 5 '10 at 9:33
Daniel VassalloDaniel Vassallo
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Importing a CSV file into a sqlite3 database table using Python
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answered May 22 '10 at 12:20
mechanical_meatmechanical_meat
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Dictionary vs Object - which is more efficient and why?
... __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_obj.py:
class Obj(object):
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_dict.py:
all = {}
for i in range(1000000):
o = {...
Zero-pad digits in string
...Rudolph
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What is the best way to repeatedly execute a function every x seconds?
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Aaron MaenpaaAaron Maenpaa
98.1k1010 gold badges9191 silver badges106106 bronze badges
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How can I join elements of an array in Bash?
...
A 100% pure Bash function that supports multi-character delimiters is:
function join_by { local d=$1; shift; local f=$1; shift; printf %s "$f" "${@/#/$d}"; }
For example,
join_by , a b c #a,b,c
join_by ' , ' a b c #a , b , c
j...