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mkdir's “-p” option
So this doesn't seem like a terribly complicated question I have, but it's one I can't find the answer to. I'm confused about what the -p option does in Unix. I used it for a lab assignment while creating a subdirectory and then another subdirectory within that one. It looked like this:
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filtering NSArray into a new NSArray in Objective-C
I have an NSArray and I'd like to create a new NSArray with objects from the original array that meet certain criteria. The criteria is decided by a function that returns a BOOL .
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Better way to sum a property value in an array
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console.log(traveler.sum('Amount')); //~> 235
Original Answer
Since it is an array you could add a function to the Array prototype.
traveler = [
{ description: 'Senior', Amount: 50},
{ description: 'Senior', Amount: 50},
{ description: 'Adult', Amount: 75},
{ description:...
.NET - Dictionary locking vs. ConcurrentDictionary
...gh information on ConcurrentDictionary types, so I thought I'd ask about it here.
8 Answers
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How to check if a variable is set in Bash?
...a parameter expansion which evaluates to nothing if var is unset, and substitutes the string x otherwise.
Quotes Digression
Quotes can be omitted (so we can say ${var+x} instead of "${var+x}") because this syntax & usage guarantees this will only expand to something that does not require quote...
How to escape indicator characters (i.e. : or - ) in YAML
... assign a URL. The problem is that YAML interprets : and - characters as either creating mappings or lists, so it has a problem with the line
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Parsing HTML using Python
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So that I can ask it to get me the content/text in the div tag with class='container' contained within the body tag, Or something similar.
try:
from BeautifulSoup import BeautifulSoup
except ImportError:
from bs4 import BeautifulSou...
startActivityForResult() from a Fragment and finishing child Activity, doesn't call onActivityResult
FirstActivity.Java has a FragmentA.Java which calls startActivityForResult() .
SecondActivity.Java call finish() but onActivityResult never get called which is
written in FragmentA.Java .
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'Contains()' workaround using Linq to Entities?
...the Silverlight ADO.Net Data Services client api (and therefore Linq To Entities). Does anyone know of a workaround to Contains not being supported?
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How to assign the output of a command to a Makefile variable
I need to execute some make rules conditionally, only if the Python installed is greater than a certain version (say 2.5).
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