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What are “named tuples” in Python?
...
from typing import NamedTuple
class ANamedTuple(NamedTuple):
"""a docstring"""
foo: int
bar: str
baz: list
The above is the same as the below, except the above additionally has type annotations and a docstring. The below is available in Python 2+:
>>> from collections i...
Rails where condition using NOT NIL
...S NOT NULL
Note that this syntax reports a deprecation (it talks about a string SQL snippet, but I guess the hash condition is changed to string in the parser?), so be sure to add the references to the end:
Foo.includes(:bar).where.not(bars: {id: nil}).references(:bar)
DEPRECATION WARNING: I...
For files in directory, only echo filename (no path)
...earning more about parameter expansion: wiki.bash-hackers.org/syntax/pe#substring_removal
– DougW
Jan 26 '12 at 1:59
1
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Entity Framework is Too Slow. What are my options? [closed]
...timise (using projections) those few queries where you really need use the extra benefit. EF and POCO gives you reasonable default, which is very nice!
– Victor
Jan 16 '14 at 21:49
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Postgresql aggregate array
...
What I understand you can do something like this:
SELECT p.p_name,
STRING_AGG(Grade.Mark, ',' ORDER BY Grade.Mark) As marks
FROM Student
LEFT JOIN Grade ON Grade.Student_id = Student.Id
GROUP BY Student.Name;
EDIT
I am not sure. But maybe something like this then:
SELECT p.p_name,
...
How to best display in Terminal a MySQL SELECT returning too many fields?
...above comment, when you type SELECT * FROM sometable\G you are sending the string to the mysql command line client, not Windows, which is why the G is case sensitive
– Hurricane Hamilton
Mar 24 '14 at 15:31
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How do I correctly clone a JavaScript object?
...*/
setTimeout(function(){
var d2 = clone(d1);
alert("d1 = " + d1.toString() + "\nd2 = " + d2.toString());
}, 5000);
The date string for d1 will be 5 seconds behind that of d2. A way to make one Date the same as another is by calling the setTime method, but that is specific to the Date clas...
Is the pImpl idiom really used in practice?
...ss, I would consider caution because all those benefits come at a cost: an extra level of indirection is required in order to access the implementation methods.
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Save Screen (program) output to a file
...cess:
logfile test.log
logfile flush 1
log on
logtstamp after 1
logtstamp string "[ %t: %Y-%m-%d %c:%s ]\012"
logtstamp on
If you want to do it "on the fly", you can change logfile automatically.
\012 means "new line", as using \n will print it on the log file: source.
Start your command with the...
Apache VirtualHost 403 Forbidden
..."Require all granted" to each virtual host settings inside the apache/conf/extra/httpd-vhosts.conf file.
– Soundfx4
Jul 14 '15 at 22:33
1
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