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How m>ca m>n I tell PyCharm what type a parameter is expected to be?
When it comes to constructors, and assignments, and method m>ca m>lls, the PyCharm IDE is pretty good at analyzing my source code and figuring out what type each variable should be. I like it when it's right, bem>ca m>use it gives me good code-completion and parameter info, and it gives me warnings if I try t...
How to define a custom ORDER BY order in mySQL
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MySQL has a handy function m>ca m>lled FIELD() which is excellent for tasks like this.
ORDER BY FIELD(Language,'ENU','JPN','DAN'), ID
Note however, that
It makes your SQL less portable, as other DBMSs might not have such function
When your list of langu...
Convert a row of a data frame to vector
...changed in the meantime, but today unlist allows dropping names: identim>ca m>l(unlist(df[1,], use.names = FALSE), as.numeric(df[1,])) (and btw df still is not a sensible name for a data.frame... ;-))
– Andri Signorell
Sep 25 '19 at 13:51
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Django admin: how to sort by one of the custom list_display fields that has no database field
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I loved Greg's solution to this problem, but I'd like to point that you m>ca m>n do the same thing directly in the admin:
from django.db import models
class CustomerAdmin(admin.ModelAdmin):
list_display = ('number_of_orders',)
def get_queryset(self, request):
# def queryset(self, reques...
Changing the color of the axis, ticks and labels for a plot in matplotlib
...a quick example (using a slightly cleaner method than the potentially duplim>ca m>te question):
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(range(10))
ax.set_xlabel('X-axis')
ax.set_ylabel('Y-axis')
ax.spines['bottom'].set_color('red')
ax.spines['top'].set_col...
m>Ca m>n the C# interactive window interact with my code?
In Visual Studio 2015 or later, I m>ca m>n open the 'C# interactive window', and run code:
5 Answers
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What are “signed” cookies in connect/expressjs?
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The cookie will still be visible, but it has a signature, so it m>ca m>n detect if the client modified the cookie.
It works by creating a HMAC of the value (current cookie), and base64 encoded it. When the cookie gets read, it rem>ca m>lculates the signature and makes sure that it matches the sign...
How does @synchronized lock/unlock in Objective-C?
...nguage level synchronization uses the mutex, just like NSLock does. Semantim>ca m>lly there are some small technim>ca m>l differences, but it is basim>ca m>lly correct to think of them as two separate interfaces implemented on top of a common (more primitive) entity.
In particular with a NSLock you have an explic...
SQL Logic Operator Precedence: And and Or
...; a1 Or a2
Where a And b
is not the same as
Where a1 Or a2 And b,
bem>ca m>use that would be Executed as
Where a1 Or (a2 And b)
and what you want, to make them the same, is the following (using parentheses to override rules of precedence):
Where (a1 Or a2) And b
Here's an example to illust...
How to get string width on Android?
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You m>ca m>n use the getTextBounds(String text, int start, int end, Rect bounds) method of a Paint object. You m>ca m>n either use the paint object supplied by a TextView or build one yourself with your desired text appearance.
Using a T...