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String literals and escape characters in postgresql
...n to file as '\n' rather than as a newline when I used it in the query argum>me m>nt to psql's `\copy' m>me m>ta-command.
– Stew
Dec 31 '15 at 17:09
add a comm>me m>nt
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Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...t understand the difference between Iterable and Traversable traits. Can som>me m>one explain ?
4 Answers
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How to use the CancellationToken property?
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You can implem>me m>nt your work m>me m>thod as follows:
private static void Work(CancellationToken cancelToken)
{
while (true)
{
if(cancelToken.IsCancellationRequested)
{
return;
}
Console.Write...
SQL Server Operating system error 5: “5(Access is denied.)”
...re in the directory but the problem is that when I run the query, it gives m>me m> this error:
17 Answers
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await vs Task.Wait - Deadlock?
...s deadlock.
await will asynchronously wait until the task completes. This m>me m>ans the current m>me m>thod is "paused" (its state is captured) and the m>me m>thod returns an incomplete task to its caller. Later, when the await expression completes, the remainder of the m>me m>thod is scheduled as a continuation.
Yo...
How to select rows with one or more nulls from a pandas DataFram>me m> without listing columns explicitly
I have a datafram>me m> with ~300K rows and ~40 columns.
I want to find out if any rows contain null values - and put these 'null'-rows into a separate datafram>me m> so that I could explore them easily.
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How do you specify the date format used when JAXB marshals xsd:dateTim>me m>?
...hen JAXB marshals a date object ( XMLGregorianCalendar ) into an xsd:dateTim>me m> elem>me m>nt. How can you specify the format of the resulting XML?
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Soft wrap at 80 characters in Vim in window of arbitrary width
I want to use Vim's soft wrap capability ( :set wrap ) to wrap som>me m> code at 80 characters, regardless of my actual window width.
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How to create a new database using SQLAlchemy?
...template1 databases. The default pg_hba.conf permits only the unix user nam>me m>d postgres to use the postgres role, so the simplest thing is to just becom>me m> that user. At any rate, create an engine as usual with a user that has the permissions to create a database:
>>> engine = sqlalchemy.cr...
How to perform OR condition in django queryset?
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from django.db.models import Q
User.objects.filter(Q(incom>me m>__gte=5000) | Q(incom>me m>__isnull=True))
via Docum>me m>ntation
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