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Do declared properties require a corresponding instance variable?
...des your getter/setter for you. The auto-coder setter initializes integers and floats to zero, for example. IF you declare an instance variable, and DO NOT specify a corresponding @property, then you cannot use @synthesize and must write your own getter/setter.
You can always override the auto-cod...
Array include any value from another array?
...
(cheeses & foods).empty?
As Marc-André Lafortune said in comments, & works in linear time while any? + include? will be quadratic. For larger sets of data, linear time will be faster. For small data sets, any? + include? may be faster as shown by Lee Ja...
SQL Server Output Clause into a scalar variable
...
You need a table variable and it can be this simple.
declare @ID table (ID int)
insert into MyTable2(ID)
output inserted.ID into @ID
values (1)
share
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Import error: No module name urllib2
...ule has been split across several modules in Python 3 named urllib.request and urllib.error. The 2to3 tool will automatically adapt imports when converting your sources to Python 3.
So you should instead be saying
from urllib.request import urlopen
html = urlopen("http://www.google.com/").read()
...
How can I get name of element with jQuery?
...his).attr('name'); on a class selector $('.jobSelect').change(function() { and I didn't encounter problems.
– Ömer An
Dec 28 '19 at 8:57
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Overwrite or override
It might seem to be a stupid question but I'm just so curious and want to use the correct term when talking about the issue. Couldn't find a similar question here so I decided to create a new one.
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How do you tell a specific Delayed::Job to run in console?
...te anything even though I've restarted it several times, even kill -9'd it and restarted it. It won't run any jobs.
3 Answe...
Reset PHP Array Index
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Use array_keys() function get keys of an array and array_values() function to get values of an array.
You want to get values of an array:
$array = array( 3 => "Hello", 7 => "Moo", 45 => "America" );
$arrayValues = array_values($array);// returns all values wit...
difference between collection route and member route in ruby on rails?
What is the difference between collection routes and member routes in Rails?
4 Answers
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In Postgresql, force unique on combination of two columns
...l1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good primary key:
CREATE TABLE someTable (
col1 int NOT NULL,
col2 int NOT NULL,
primary key (col1, col2)
)
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