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Checking if a string can be converted to float in Python
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Except that you forgot to name your function "will_it_float".
– unmounted
Apr 10 '09 at 1:07
3
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_=> what does this underscore mean in Lambda expressions?
What does an lambda expression like _=> expr mean?
5 Answers
5
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Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...t to you, but it's not the case here @Toolkit
– Arion_Miles
Oct 21 '18 at 6:29
1
This is not real...
What is the most effective way for float and double comparison?
...all depends on context and the expected size of a and b.
BTW, std::numeric_limits<double>::epsilon() is the "machine epsilon". It is the difference between 1.0 and the next value representable by a double. I guess that it could be used in the compare function but only if the expected values a...
Bash continuation lines
...here document. (Line terminators will still remain, though.)
cat <<-____HERE
continuation
lines
____HERE
See also http://ss64.com/bash/syntax-here.html
If you need to preserve some, but not all, leading whitespace, you might use something like
sed 's/^ //' <<____HERE
Th...
How to list all functions in a Python module?
...n example with inspect:
from inspect import getmembers, isfunction
from my_project import my_module
functions_list = [o for o in getmembers(my_module) if isfunction(o[1])]
getmembers returns a list of (object_name, object_type) tuples.
You can replace isfunction with any of the other isXXX func...
How do I perform the SQL Join equivalent in MongoDB?
...ttps://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup
From the docs:
{
$lookup:
{
from: <collection to join>,
localField: <field from the input documents>,
foreignField: <field from the documents of the "from" collection>...
Is there a standard way to list names of Python modules in a package?
...tforward way to list the names of all modules in a package, without using __all__ ?
10 Answers
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Count the number occurrences of a character in a string
...quently, check out collections.Counter:
from collections import Counter
my_str = "Mary had a little lamb"
counter = Counter(my_str)
print counter['a']
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How to change Rails 3 server default port in develoment?
..."rails" with Rails 3 gems installed from the root of your application.
APP_PATH = File.expand_path('../../config/application', __FILE__)
require File.expand_path('../../config/boot', __FILE__)
# THIS IS NEW:
require "rails/commands/server"
module Rails
class Server
def default_options
...