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Stop pip from failing on single package when installing with requirements.txt
...ine with pip install may be a workaround.
cat requirements.txt | xargs -n 1 pip install
Note: -a parameter is not available under MacOS, so old cat is more portable.
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Add a dependency in Maven
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139
You'll have to do this in two steps:
1. Give your JAR a groupId, artifactId and version and ad...
How to set enum to null
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edited Mar 11 '15 at 14:45
MikeTheLiar
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What is the type of lambda when deduced with “auto” in C++11?
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The type of a lambda expression is unspecified.
But they are generally mere syntactic sugar ...
Why use symbols as hash keys in Ruby?
...hed keys" against each other.
Long answer:
https://web.archive.org/web/20180709094450/http://www.reactive.io/tips/2009/01/11/the-difference-between-ruby-symbols-and-strings
http://www.randomhacks.net.s3-website-us-east-1.amazonaws.com/2007/01/20/13-ways-of-looking-at-a-ruby-symbol/
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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...line to your Post model, after specifying has_attached_file :image
Option 1: Validate content type
validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
-OR- another way
validates_attachment :image, content_type: { content_type: ["im...
Convert array of integers to comma-separated string
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edited May 31 '13 at 18:34
Gibron
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how to provide a swap function for my class?
...amp; lhs, Bar& rhs) {
// ...
}
}
If swap is now used as shown in 1), your function will be found. Also, you may make that function a friend if you absolutely need to, or provide a member swap that is called by the free function:
// version 1
class Bar{
public:
friend void swap(Bar&...
Delete specific line number(s) from a text file using sed?
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If you want to delete lines 5 through 10 and 12:
sed -e '5,10d;12d' file
This will print the results to the screen. If you want to save the results to the same file:
sed -i.bak -e '5,10d;12d' file
This will back the file up to file.bak, and delete the given...