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What is the difference between an expression and a statement in Python?
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123
Expression -- from the New Oxford American Dictionary:
expression: Mathematics a collecti...
Adding :default => true to boolean in existing Rails column
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change_column :things, :price_1, :integer, default: 123, null: false
Seems to be best way to add a default to an existing column that doesn't have null: false already.
Otherwise:
change_column :things, :price_1, :integer, default: 123
Some research I did on this:
https:...
How to select where ID in Array Rails ActiveRecord without exception
...ore relevant for Rails 4.x
Do this:
current_user.comments.where(:id=>[123,"456","Michael Jackson"])
The stronger side of this approach is that it returns a Relation object, to which you can join more .where clauses, .limit clauses, etc., which is very helpful. It also allows non-existent IDs ...
How to check if a String is numeric in Java
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@kape123 :) sure "123.456" doesn´t contain digits.
– Ahmed Alejo
Nov 14 '14 at 18:01
8
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curl json post request via terminal to a rails app
...firstname","last_name":"lastname","email":"email@email.com","password":"app123","password_confirmation":"app123"}}' \
http://localhost:3000/api/1/users
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Does Python have “private” variables in classes?
...names the variable.
class A:
def __init__(self):
self.__var = 123
def printVar(self):
print self.__var
Now, if you try to access __var outside the class definition, it will fail:
>>>x = A()
>>>x.__var # this will return error: "A has no attribute __var...
How do you Encrypt and Decrypt a PHP String?
...xample I want to pass a GET parameter from page to page, let's say prod_id=123 but I just do not want to make 123 readable for everybody, however even if they could read it, it won't be a problem. An attacker being able to replace the 123 to a custom value won't cause any harm, he/she will only be a...
Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
...technique for left-padding to any desired width:
declare @x int = 123 -- value to be padded
declare @width int = 25 -- desired width
declare @pad char(1) = '0' -- pad character
select right_justified = replicate(
@pad ,
@width-le...
ValueError: invalid literal for int() with base 10: ''
...answered Apr 23 '19 at 3:21
Brad123Brad123
49233 silver badges66 bronze badges
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Sorting a list using Lambda/Linq to objects
... answered Jan 2 '13 at 16:32
gls123gls123
4,89922 gold badges2424 silver badges2626 bronze badges
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