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Set default CRAN mirror permanent in R
...?Startup:
The
path of this file is taken from the value of the R_PROFILE
environment variable (after tilde expansion). If this variable is
unset, the default is R_HOME/etc/Rprofile.site, which is used if
it exists (which it does not in a 'factory-fresh' installation)...
validation custom message for rails 3
...ant to remove the field title from the message you should use this on your _form.htmk.erb view:
As you can see inside this view:
<ul>
<% @article.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
Replace it by:
<ul>
...
How to get all possible combinations of a list’s elements?
...nd iterate through that:
from itertools import chain, combinations
def all_subsets(ss):
return chain(*map(lambda x: combinations(ss, x), range(0, len(ss)+1)))
for subset in all_subsets(stuff):
print(subset)
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SSL Error: CERT_UNTRUSTED while using npm command
...hat running sudo npm cache clean -f then sudo npm install -g n gives a CERT_UNTRUSTED error after the second command.
– fuzzi
Apr 11 '18 at 20:17
2
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How to print number with commas as thousands separators?
... For Python ≥3.6
Locale aware
import locale
locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8'
'{:n}'.format(value) # For Python ≥2.7
f'{value:n}' # For Python ≥3.6
Reference
Per Format Specification Mini-Language,
The ',' option signals the use...
How to center align the cells of a UICollectionView?
...n UIEdgeInsetsMake(0, padding, 0, padding);
}
Swift
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
let flowLayout = collectionViewLayout as! UICollectionViewFlowLayout
let nu...
ImageConvertor 扩展：免费图像转换器，支持JPG/PNG/WEBP格式转换和图像处...
...路径 = 文件选择器.路径
设置 旋转后路径 = "/sdcard/rotated_image.jpg"
调用 ImageConvertor1.Rotate 原图路径 旋转后路径 90
图像缩放
当 缩放按钮.被点击
设置 原图路径 = "/sdcard/large_image.jpg"
设置 缩放后路径 = "/sdca...
SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error
...tu 10.10)
mvn --version
Apache Maven 2.2.1 (rdebian-4) Java version: 1.6.0_20 Java home:
/usr/lib/jvm/java-6-openjdk/jre Default locale: de_DE, platform
encoding: UTF-8 OS name: "linux" version: "2.6.35-32-generic" arch:
"amd64" Family: "unix"
2 Run maven externally link how to run maven from con...
“render :nothing => true” returns empty plaintext file?
...nt type like this:
render :nothing => true, :status => 200, :content_type => 'text/html'
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How to sort Map values by key in Java?
...
@cricket_007 the code is demonstrating specifically how to iterate across they keys for a map that isn't already sorted.
– Jherico
Mar 2 '16 at 17:47
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