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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...ays "MissingRequiredValidatorError"
I thought that by updating post_params and giving it :image it would be fine, as both create and update use post_params
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How to make PyCharm always show line numbers
...g to enable line numbers for all files, but I have to always right click and enable this on per file basis.
6 Answers
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How can I search for a commit message on GitHub?
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I've been watching for five minutes and I can't figure out where the mouse goes after it zooms down and to the right.
– Kevin Krumwiede
Jul 14 '18 at 21:44
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In CMake, how can I test if the compiler is Clang?
We have a set of cross-platform CMake build scripts , and we support building with Visual C++ and GCC .
5 Answers
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Regular expression to match balanced parentheses
...ia well suited to regular expressions are also in play. 3) Often you are handing a regular expression into some API that only accepts regular expressions and you have no choice.
– Kenneth Baltrinic
May 2 '14 at 3:31
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How do I run a Java program from the command line on Windows?
I'm trying to execute a Java program from the command line in Windows. Here is my code:
12 Answers
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Check whether an array is empty [duplicate]
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There are two elements in array and this definitely doesn't mean that array is empty. As a quick workaround you can do following:
$errors = array_filter($errors);
if (!empty($errors)) {
}
array_filter() function's default behavior will remove all values...
Converting a Pandas GroupBy output from Series to DataFrame
...taFrame. It has a hierarchical index, though:
In [19]: type(g1)
Out[19]: pandas.core.frame.DataFrame
In [20]: g1.index
Out[20]:
MultiIndex([('Alice', 'Seattle'), ('Bob', 'Seattle'), ('Mallory', 'Portland'),
('Mallory', 'Seattle')], dtype=object)
Perhaps you want something like this?
In ...
Get original URL referer with PHP?
...t the referer Url. It works as expected until the user clicks another page and the referer changes to the last page.
5 Answ...
Breaking up long strings on multiple lines in Ruby without stripping newlines
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I'm fairly sure that it's not; I tried both undef'ing and redefining String#+ and it doesn't seem like anything is being sent there.
– Jessehz
May 9 '12 at 22:08
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