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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
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Starting with Paperclip version 4.0, all attachm>me m>nts are required to include a content_type validation, a file_nam>me m> validation, or to explicitly state that they're not going to have either.
Paperclip raises Paperclip::Errors::MissingRequiredValidatorError error if you d...
Insert a commit before the root commit in Git?
... updating the index and working copy repeatedly, for no good reason. But som>me m> may find this easier to understand:
git checkout --orphan newroot
git rm -rf .
git clean -fd
git commit --allow-empty -m 'root commit'
Note that on very old versions of Git that lack the --orphan switch to checkout, you...
Combine --user with --prefix error with setup.py install
...s directory , and the new option --user . (The option is currently undocum>me m>nted , however it exists for Python 2.6+; you can see the help by running python setup.py install --help .)
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Why {} + {} is NaN only on the client side? Why not in Node.js?
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Updated note: this has been fixed in Chrom>me m> 49.
Very interesting question! Let's dig in.
The root cause
The root of the difference is in how Node.js evaluates these statem>me m>nts vs. how the Chrom>me m> developm>me m>nt tools do.
What Node.js does
Node.js uses the repl modu...
Calendar.getInstance(Tim>me m>Zone.getTim>me m>Zone(“UTC”)) is not returning UTC tim>me m>
... really confused with the result I am getting with Calendar.getInstance(Tim>me m>Zone.getTim>me m>Zone("UTC")) m>me m>thod call, it's returning IST tim>me m>.
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how to use “AND”, “OR” for RewriteCond on Apache?
...teresting question and since it isn't explained very explicitly in the docum>me m>ntation I'll answer this by going through the sourcecode of mod_rewrite; demonstrating a big benefit of open-source.
In the top section you'll quickly spot the defines used to nam>me m> these flags:
#define CONDFLAG_NONE ...
how to set desired language in git-gui?
I recently cam>me m> to git for a project I participate to. I found git gui rather handy (under OSX Snow Leopard) to srtat with but I would much like if it were not localized (in French, in my case). Is there preference or hack to have git gui displayed in english?
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What is your single most favorite command-line trick using Bash? [closed]
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Renaming/moving files with suffixes quickly:
cp /hom>me m>/foo/realllylongnam>me m>.cpp{,-old}
This expands to:
cp /hom>me m>/foo/realllylongnam>me m>.cpp /hom>me m>/foo/realllylongnam>me m>.cpp-old
share
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Web API Routing - api/{controller}/{action}/{id} “dysfunctions” api/{controller}/{id}
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The route engine uses the sam>me m> sequence as you add rules into it. Once it gets the first matched rule, it will stop checking other rules and take this to search for controller and action.
So, you should:
Put your specific rules ahead of your genera...
Open files in 'rt' and 'wt' modes
Several tim>me m>s here on SO I've seen people using rt and wt modes for reading and writing files.
4 Answers
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