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How get integer value from a enum in Rails?
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You can get the integer values for an enum from the class the enum is on:
Model.sale_infos # Pluralized version of the enum attribute name
That returns a hash like:
{ "plan_1" => 1, "plan_2" => 2 ... }
You can then use the sale_info value from ...
throw Error('msg') vs throw new Error('msg')
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Yes. For current docs see: ecma-international.org/ecma-262/6.0/…
– theUtherSide
May 18 '18 at 0:27
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Finding current executable's path without /proc/self/exe
...nt way to find the current application's directory in C/C++ with cross-platform interfaces. I've seen some projects mucking around with argv[0], but it doesn't seem entirely reliable.
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How do I add multiple arguments to my custom template filter in a django template?
...ll your arguments into a single string using a comma to separate them.
So for example, if you want a filter that checks if variable X is in the list [1,2,3,4] you will want a template filter that looks like this:
{% if X|is_in:"1,2,3,4" %}
Now we can create your templatetag like this:
from djan...
git diff two files on same branch, same commit
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You don't need git for that, just use diff fileA.php fileB.php (or vimdiff if you want side by side comparison)
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In Python how should I test if a variable is None, True or False
...as to what exactly went wrong, in case you find error/no-error not to be informative enough.
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Is there a short contains function for lists?
...erse operator:
if myItem not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
sh...
How to maintain aspect ratio using HTML IMG tag
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This makes no sense for dynamic applications. It is not known whether width or height will be at 64px, as it depends on the ratio of the image. Why is this the upvoted response?
– Koenigsberg
Jul 31 '18 at ...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...9)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '(\xef\xbd\xa1\xef\xbd\xa5\xcf\x89\xef\xbd\xa5\xef\xbd\xa1)\xef\xbe\x89'
>>> s1 = s.decode('utf-8')
>>> print s1
(｡･ω･｡)ﾉ
>>>
On my terminal the ...
PostgreSQL error 'Could not connect to server: No such file or directory'
...r when I run rake db:migrate in my project or even try most database tasks for my Ruby on Rails 3.2 applications.
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