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Efficiently updating database using SQLAlchemy ORM
...tements don't affect the objects that are in your session.
So if you say
for c in session.query(Stuff).all():
c.foo = c.foo+1
session.commit()
it will do what it says, go fetch all the objects from the database, modify all the objects and then when it's time to flush the changes to the datab...
Some built-in to pad a list in python
...s me half a minute to understand. The accepted answer is much more straightforward.
– Richard Möhn
Dec 11 '19 at 2:43
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How to access session variables from any class in ASP.NET?
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(Updated for completeness)
You can access session variables from any page or control using Session["loginId"] and from any class (e.g. from inside a class library), using System.Web.HttpContext.Current.Session["loginId"].
But please ...
What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]
...T bug existed in .NET 4.0, but was uncovered by the change in the compiler for .NET 4.5.
I do not think that beforefieldinit is the only issue here. I think it's simpler than that.
The type System.String in mscorlib.dll from .NET 4.0 contains a static constructor:
.method private hidebysig speci...
How to suppress scientific notation when printing float values?
...,
'%f' % (1/10**8)
will display zeros only.
details are in the docs
Or for Python 3 the equivalent old formatting or the newer style formatting
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How can I use numpy.correlate to do autocorrelation?
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To answer your first question, numpy.correlate(a, v, mode) is performing the convolution of a with the reverse of v and giving the results clipped by the specified mode. The definition of convolution, C(t)=∑ -∞ < i < ∞ aivt+i where -∞ < t < ∞, allows for results from...
What is a plain English explanation of “Big O” notation?
I'd prefer as little formal definition as possible and simple mathematics.
41 Answers
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Suppressing deprecated warnings in Xcode
With all the SDKs floating around, it's handy to be able to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings involving methods that have changed or been superseded:
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Resolve Type from Class Name in a Different Assembly
... missing something minor like including the assembly. This solution worked for my needs. Thanks.
– Brandon
Aug 18 '10 at 13:21
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Is it alright to use target=“_blank” in HTML5?
...e one window opening, even if they click the link several times. It makes for a much nicer UX.
– BanksySan
Aug 2 '13 at 9:27
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