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if else in a list comprehension [duplicate]
... you're getting this error has to do with how the list comprehension is performed.
Keep in mind the following:
[ expression for item in list if conditional ]
Is equivalent to:
for item in list:
if conditional:
expression
Where the expression is in a slightly different format (thin...
Doing HTTP requests FROM Laravel to an external API
...res = $client->request('POST', 'https://url_to_the_api', [
'form_params' => [
'client_id' => 'test_id',
'secret' => 'test_secret',
]
]);
echo $res->getStatusCode();
// 200
echo $res->getHeader('...
How to store a list in a column of a database table
...ned SQL developers.
The principle you're violating is called first normal form, which is the first step in database normalization.
At the risk of oversimplifying things, database normalization is the process of defining your database based upon what the data is, so that you can write sensible, con...
What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
...
There is absolutely no difference in performance. Final version prepared by SQL Server would be the same in both the cases.
– Sateesh Pagolu
Feb 27 '15 at 0:31
...
Right HTTP status code to wrong input
...ample, this error condition may occur if an XML request body contains well-formed (i.e., syntactically correct), but semantically erroneous, XML instructions.
source: https://www.bennadel.com/blog/2434-http-status-codes-for-invalid-data-400-vs-422.htm
...
What is (functional) reactive programming?
...
Semantic determinacy is very important for reasoning, both rigorous and informal.
While concurrency adds enormous complexity to imperative programming (due to nondeterministic interleaving), it is effortless in FRP.
So, what is FRP?
You could have invented it yourself.
Start with these ideas:
Dy...
How to change the button text of ?
...
Use Bootstrap FileStyle, which is used to style the file fields of forms. It is a plugin for a jQuery-based component library called Twitter Bootstrap
Sample usage:
Include:
<script type="text/javascript" src="js/bootstrap-filestyle.min.js"> </script>
Via JavaScript:
$(":fi...
Get model's fields in Django
...
_meta is private, but it's relatively stable. There are efforts to formalise it, document it and remove the underscore, which might happen before 1.3 or 1.4. I imagine effort will be made to ensure things are backwards compatible, because lots of people have been using it anyway.
If you're ...
ComboBox: Adding Text and Value to an Item (no Binding Source)
... I believe that may only be available in ASP.NET and not WinForms.
– Adam Markowitz
Jun 17 '10 at 16:10
1
...
Why should the copy constructor accept its parameter by reference in C++?
...ard in §12.8/3:
A declaration of a constructor for a
class X is ill-formed if its first
parameter is of type (optionally cv-
qualified) X and either there are no
other parameters or else all other
parameters have default arguments.
...