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What does “mro()” do?
... Method Resolution Order. It returns a list of types the class is derived from, in the order they are searched for methods.
mro() or __mro__ works only on new style classes. In python 3, they work without any issues. But in python 2 those classes need to inherit from object.
...
How exactly do Django content types work?
...Blah blah, let's dive into some code and see what I mean.
# ourapp.models
from django.conf import settings
from django.db import models
# Assign the User model in case it has been "swapped"
User = settings.AUTH_USER_MODEL
# Create your models here
class Post(models.Model):
author = models.Forei...
What's the difference between Git Revert, Checkout and Reset?
...ar.
git revert
This command creates a new commit that undoes the changes from a previous commit. This command adds new history to the project (it doesn't modify existing history).
git checkout
This command checks-out content from the repository and puts it in your work tree. It can also have oth...
How can I do a line break (line continuation) in Python?
...== True and \
b == False
Check the style guide for more information.
From your example line:
a = '1' + '2' + '3' + \
'4' + '5'
Or:
a = ('1' + '2' + '3' +
'4' + '5')
Note that the style guide says that using the implicit continuation with parentheses is preferred, but in this part...
What is the difference between quiet NaN and signaling NaN?
I have read about floating-point and I understand that NaN could result from operations. But I can't understand what these are concepts exactly. What is the difference between them?
...
Get element from within an iFrame
How do you get a <div> from within an <iframe> ?
7 Answers
7
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File is universal (three slices), but it does not contain a(n) ARMv7-s slice error for static librar
... case, use menu Project -> Build Settings -> remove the architecture from "valid architectures".
You can use this as a temporary solution until the library has been updated. You have to remove the architecture from your main project, not from the library.
Alternatively, you can set the flag ...
Load multiple packages at once
...dplyr, psych, tm)
and if the package is missing p_load will download it from CRAN or Bioconductor.
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How to convert R Markdown to PDF?
...g.,
render("input.Rmd", "pdf_document")
Command-line:
When I run render from the command-line (e.g., using a makefile), I sometimes have issues with pandoc not being found. Presumably, it is not on the search path.
The following answer explains how to add pandoc to the R environment.
So for exam...
NSPredicate: filtering objects by day of NSDate property
...ponents = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth ) fromDate:[NSDate date]];
//create a date with these components
NSDate *startDate = [calendar dateFromComponents:components];
[components setMonth:1];
[components setDay:0]; //reset the other components
[components setYear:0];...