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How can I combine hashes in Perl?
...%hash1 always have unique keys. I would also prefer a single line of code if possible.
4 Answers
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ruby on rails f.select options with custom attributes
...=>c.currency_code}] },
selected_key = f.object.country_id) %>
If you need grouped options, you can use the grouped_options_for_select helper, like this (if @continents is an array of continent objects, each having a countries method):
<%= f.select :country_id, grouped_options_for_se...
How to find patterns across multiple lines using grep?
...les that have "abc" AND "efg" in that order, and those two strings are on different lines in that file. Eg: a file with content:
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Detect when an image fails to load in Javascript
Is there a way to determine if a image path leads to an actual image, Ie, detect when an image fails to load in Javascript.
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Can I have multiple primary keys in a single table?
... In this example, BOTH userid and userdataid are needed to identify/find a unique row. Not sure what the OP's intention was, but I came here looking to see if I could uniquely identify a row with one of a set of keys. For instance, I would like to identify a unique user with either a user...
Hide options in a select list using jQuery
... "]").hide();
Note that this will probably break in various hideous ways if title contains jQuery selector metacharacters.
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Reloading module giving NameError: name 'reload' is not defined
...in Python 2, but not in Python 3, so the error you're seeing is expected.
If you truly must reload a module in Python 3, you should use either:
importlib.reload for Python 3.4 and above
imp.reload for Python 3.0 to 3.3 (deprecated since Python 3.4 in favour of importlib)
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$watch an object
...s in JavaScript, they will be checked for "reference" equality, which asks if the two objects refer to the same thing, rather than "value" equality, which checks if the values of all the properties of those objects are equal.
Per the Angular documentation, the third parameter is for objectEquality:...
How can I strip all punctuation from a string in JavaScript using regex?
If I have a string with any type of non-alphanumeric character in it:
13 Answers
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Jinja2 shorthand conditional
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Yes, it's possible to use inline if-expressions:
{{ 'Update' if files else 'Continue' }}
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