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Purpose of “consider_all_requests_local” in config/environments/development.rb?
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Non-local requests result in user-friendly error pages. Local requests, assumed to come from developers, see a more useful error message that includes line numbers and a backtrace. consider_all_requests_local allows your app to d...
What is the meaning of the term “free function” in C++?
While reading the documentation for boost::test, I came across the term "free function". What I understand is that a free function is any function that doesn't return anything (Its return type is void). But after reading further it seems that free functions also don't take any arguments. But I am no...
regex for matching something if it is not preceded by something else
...lar Expressions - Lookaround for more information.
Edit: added the \w* to capture the characters before (e.g. "beach").
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Unique constraint that allows empty values in MySQL
...des. The codes are unique, but some products simply doesn't have a code. I can't invent codes because those are providers codes.
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Insert the carriage return character in vim
...protocol frame stored a file in Unix ( \n newlines). I need to insert the carriage return character ( U+000D aka \r ). When I try to paste it from the clipboard ( "+p ) or type it using Ctrl + Shift + u - 000d , the linefeed is inserted ( U+000A ).
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Django fix Admin plural
How do I change some models name from "Categorys" to "Categories" on admin site in the new dev django version?
In the old version (whithout admin sites and admin models) you could just do this;
http://www.the-dig.com/blog/post/customize-plural-name-django-admin/
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How can I append a string to an existing field in MySQL?
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You need to use the CONCAT() function in MySQL for string concatenation:
UPDATE categories SET code = CONCAT(code, '_standard') WHERE id = 1;
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How do you receive a url parameter with a spring controller mapping
This issue seems trivial, but I can't get it to work properly. I'm calling my Spring controller mapping with jquery ajax. The value for someAttr is always empty string regardless of the value in the url. Please help me determine why.
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How to change the default font size in ggplot2
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Very useful! In case anyone is interested, the default text size is 11 (theme_gray()$text$size)
– Keith Hughitt
Jul 11 '16 at 21:28
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what does npm -D flag mean?
... answered Jan 30 at 2:23
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