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What is the _snowman param in Ruby on Rails 3 forms for?
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Why do you have to call .items() when iterating over a dictionary in Python?
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How can I tell PyCharm what type a parameter is expected to be?
...ire.
"""
replicant.knock_over() # Shows a warning.
See: https://www.jetbrains.com/help/pycharm/2016.1/type-hinting-in-pycharm.html#legacy
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When should use Readonly and Get only properties
...ulation posts series of Mark Seemann about properties and backing fields:
http://blog.ploeh.dk/2011/05/24/PokayokeDesignFromSmellToFragrance.aspx
taken from Mark's example:
public class Fragrance : IFragrance
{
private readonly string name;
public Fragrance(string name)
{
if ...
django admin - add custom form fields that are not part of the model
... this:
Create a custom form using the form attribute on your ModelAdmin (https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.form)
Parse the custom fields in the save_formset method on your ModelAdmin (https://docs.djangoproject.com/en/dev/ref/contrib/admin/#dj...
How to change webservice url endpoint?
...vice.getEchoPort();
/* Set NEW Endpoint Location */
String endpointURL = "http://NEW_ENDPOINT_URL";
BindingProvider bp = (BindingProvider)port;
bp.getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY, endpointURL);
System.out.println("Server said: " + echo.echo(args[0]));
...
The dr...
How to write a scalable Tcp/Ip based server
...pts TCP/IP connections for long running connections (i.e. this is not like HTTP where there are many short connections, but rather a client connects and stays connected for hours or days or even weeks).
...
Executing injected by innerHTML after AJAX call
..."#content").html(data);
myFunction();
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("error retrieving content");
}
Another quick and dirty way is to use eval() to execute any script code that you've inserted as DOM text if you don't want to use jQuery...
Convert a row of a data frame to vector
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Postgresql aggregate array
...
Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to rep...