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How to create a trie in Python
...current_dict[_end] = _end
... return root
...
>>> make_trie('foo', 'bar', 'baz', 'barz')
{'b': {'a': {'r': {'_end_': '_end_', 'z': {'_end_': '_end_'}},
'z': {'_end_': '_end_'}}},
'f': {'o': {'o': {'_end_': '_end_'}}}}
If you're not familiar with setdefault, it simply ...
How to forward declare a C++ template class?
...}
#include <iostream>
template <typename S, typename T>
void Foo (const std::vector<S,T> & vector)
{
std::cout << "do vector stuff, eg., display size = "
<< vector.size() << std::endl;
}
template <typename T>
void Foo (const T & t)
{
...
Why is the minimalist, example Haskell quicksort not a “true” quicksort?
...=)
(.&&) = liftM2 (&&)
-- ...
where doWhile cond foo = do
foo
b <- cond
when b $ doWhile cond foo
while cond foo = do
b <- cond
when b $ foo >> while cond foo
And here, a dumb test to see if it works.
...
Convert JSON String to JSON Object c#
...n = JsonConvert.DeserializeObject(str);
or try for a typed object try:
Foo json = JsonConvert.DeserializeObject<Foo>(str)
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...
pass **kwargs argument to another function with **kwargs
... answer, the following is an example that'll show you the difference:
def foo(**kwargs):
for entry in kwargs.items():
print("Key: {}, value: {}".format(entry[0], entry[1]))
# call using normal keys:
foo(a=1, b=2, c=3)
# call using an unpacked dictionary:
foo(**{"a": 1, "b":2, "c":3})
...
Convert .pem to .crt and .key
...t: it consists of the DER format base64 encoded with additional header and footer lines. On input PKCS#8 format private keys are also accepted. The NET form is a format is described in the NOTES section.
-outform DER|NET|PEM
This specifies the output format, the options have the same meaning ...
URL matrix parameters vs. query parameters
...ls of resources and sub-resources:
http://example.com/res/categories;name=foo/objects;name=green/?page=1
It really comes down to namespacing.
Note: The 'levels' of resources here are categories and objects.
If only query parameters were used for a multi-level URL, you would end up with
http:...
Difference between \A \z and ^ $ in Ruby regular expressions
...
Difference By Example
/^foo$/ matches any of the following, /\Afoo\z/ does not:
whatever1
foo
whatever2
foo
whatever2
whatever1
foo
/^foo$/ and /\Afoo\z/ all match the following:
foo
...
Serializing class instance to JSON
...thon dict and if your class is simple it will be JSON serializable.
class Foo(object):
def __init__(self):
self.x = 1
self.y = 2
foo = Foo()
s = json.dumps(foo) # raises TypeError with "is not JSON serializable"
s = json.dumps(foo.__dict__) # s set to: {"x":1, "y":2}
The abo...
What are the rules for JavaScript's automatic semicolon insertion (ASI)?
...as a semicolon)
and due to this reason, the classic example of
return
{
foo: 1
}
will not work as expected, because the JavaScript interpreter will treat it as:
return; // returning nothing
{
foo: 1
}
There has to be no line-break immediately after the return:
return {
foo: 1
}
for it t...