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Appropriate hashbang for Node.js scripts
... who only have Node installed as nodejs.
Rationale:
It's what the cool kids are doing, and if you don't do it too, you're not cool. Major node projects like jshint, karma, bower, and even npm simply use #!/usr/bin/env node as the shebang for their executable scripts.
Because the cool kids are doi...
Python: using a recursive algorithm as a generator
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This avoids the len(string)-deep recursion, and is in general a nice way to handle generators-inside-generators:
from types import GeneratorType
def flatten(*stack):
stack = list(stack)
while stack:
try: x = stack[0...
What is the C# equivalent to Java's isInstance()?
...valent of Java's isInstance. The other answer is simply wrong despite the ridiculous number of upvotes.
– Konrad Rudolph
Sep 21 '16 at 17:21
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How does one use rescue in Ruby without the begin and end block
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I'm using the def / rescue combination a lot with ActiveRecord validations:
def create
@person = Person.new(params[:person])
@person.save!
redirect_to @person
rescue ActiveRecord::RecordInvalid
render :action => :new
end
I think this is very lean code!
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Rails: How to list database tables/objects using the Rails console?
...cts').map(&:name)
You should probably wrap them in shorter syntax inside your .irbrc.
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Amazon S3 Change file download name
I have files stored on S3 with a GUID as the key name.
7 Answers
7
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How to indicate param is optional using inline JSDoc?
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I was asking how to do it inline. The example you are providing seem to be the same as what I showed in my question.
– studgeek
Apr 9 '16 at 4:04
add a commen...
TypeError: sequence item 0: expected string, int found
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string.join connects elements inside list of strings, not ints.
Use this generator expression instead :
values = ','.join(str(v) for v in value_list)
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Count cells that contain any text
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Python argparse ignore unrecognised arguments
...all unrecognised arguments and carries on. In most situations, this isn't ideal and was changed in argparse. But there are a few situations where you want to ignore any unrecognised arguments and parse the ones you've specified.
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