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Concatenating two lists - difference between '+=' and extend()
...F instruction, but for += it will use LOAD_FAST - and you get *UnboundLocalError: local variable 'l' referenced before assignment*
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How to validate a url in Python? (Malformed or not)
...alidators import URLValidator
from django.core.exceptions import ValidationError
val = URLValidator(verify_exists=False)
try:
val('http://www.google.com')
except ValidationError, e:
print e
If you set verify_exists to True, it will actually verify that the URL exists, otherwise it will ju...
What are the -Xms and -Xmx parameters when starting JVM?
... A common use for these flags is when you encounter a java.lang.OutOfMemoryError.
When using these settings, keep in mind that these settings are for the JVM's heap, and that the JVM can/will use more memory than just the size allocated to the heap. From Oracle's documentation:
Note that the JV...
What is an uninterruptible process?
...it EINTR instead of EAGAIN? Also read() returns -1 and errno is set to the error.
– lethalman
Mar 25 '15 at 9:36
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How to upload a file in Django? [closed]
...a">
{% csrf_token %}
<p>{{ form.non_field_errors }}</p>
<p>{{ form.docfile.label_tag }} {{ form.docfile.help_text }}</p>
<p>
{{ form.docfile.errors }}
{{ form.docfile }}
</...
Convert NaN to 0 in javascript
...he final result will also be NaN, which you'll immediately recognize as an error even if your error handling logic (throw/catch maybe?) isn't yet complete.
NaN as the result of an arithmetic calculation always indicates something has gone awry in the details of the arithmetic. It's a way for the c...
Remote origin already exists on 'git push' to a new repository
...
You are getting this error because "origin" is not available. "origin" is a convention not part of the command. "origin" is the local name of the remote repository.
For example you could also write:
git remote add myorigin git@github.com:myname...
VB.NET equivalent to C# var keyword [duplicate]
...tion
In detail:
without Dim:
Explicit Off, gives Object
Explicit On, error "Name '' is not declared."
with Dim:
Infer On, gives expected types
Infer Off:
Strict On, error "Option Strict On requires all declarations to have an 'As' clasue."
Strict Off, gives Object
As I mentioned in the ...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
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You should run this in the same context that the error occurs
– Nimo
Nov 27 '14 at 15:44
3
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Copying files from one directory to another in Java
..., but I don't want to copy the directory - only the files in it. Now I get error messages java.io.FileNotFoundException: (the path to trDir) (Is a directory) This is what it only says. I have used the method like this: copyDirectory(review, trDir);
– user42155
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