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How do you serialize a model instance in Django?
... object and that's all what django serializers need to correctly serialize it, eg.:
from django.core import serializers
# assuming obj is a model instance
serialized_obj = serializers.serialize('json', [ obj, ])
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...
How to get function parameter names/values dynamically?
.../d){}) // returns ['a','d']
getParamNames(function (){}) // returns []
Edit:
With the invent of ES6 this function can be tripped up by default parameters. Here is a quick hack which should work in most cases:
var STRIP_COMMENTS = /(\/\/.*$)|(\/\*[\s\S]*?\*\/)|(\s*=[^,\)]*(('(?:\\'|[^'\r\n])*')|...
Iterate over the lines of a string
...
Here are three possibilities:
foo = """
this is
a multi-line string.
"""
def f1(foo=foo): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == ...
How to convert ActiveRecord results into an array of hashes
... use as_json method which converts ActiveRecord objects to Ruby Hashes despite its name
tasks_records = TaskStoreStatus.all
tasks_records = tasks_records.as_json
# You can now add new records and return the result as json by calling `to_json`
tasks_records << TaskStoreStatus.last.as_json
ta...
Python date string to date object
...follow
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edited Aug 1 '19 at 21:52
Alan W. Smith
20.7k33 gold badges6060 silver badges8484 bronze badges
...
e.printStackTrace equivalent in python
...ava's e.printStackTrace() that exactly traces the exception to what line it occurred and prints the entire trace of it.
4...
Rename specific column(s) in pandas
...ta.rename(columns={'gdp':'log(gdp)'}, inplace=True)
The rename show that it accepts a dict as a param for columns so you just pass a dict with a single entry.
Also see related
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improve thi...
Understanding the map function
Apply function to every item of iterable and return a list of the results. If additional iterable arguments are passed, function must take that many arguments and is applied to the items from all iterables in parallel.
...
Install a .NET windows service without InstallUtil.exe
I have a standard .NET windows service written in C#.
7 Answers
7
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How to declare a global variable in php?
...
If you have a set of functions that need some common variables, a class with properties may be a good choice instead of a global:
class MyTest
{
protected $a;
public function __construct($a)
{
$this->a = $a;
}
public function head()
{
echo $this->a;...