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What is 'Pattern Matching' in functional languages?
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Understanding pattern matching requires explaining three parts:
Algebraic data types.
What pattern matching is
Why its awesome.
Algebraic data types in a nutshell
ML-like functional languages allow you define simple data types called "disjoint unions" o...
Adding iOS UITableView HeaderView (not section header)
...eight of the cell given a string, and pass that value in for heightForRowAtIndexPath. You can use NSString's method sizeWithFont:constrainedToSize: function to figure out the height of the text when constrained to a size.
– Mark
May 24 '13 at 15:31
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_=> what does this underscore mean in Lambda expressions?
...fectly fine. That's the case with For-loops and the "i" and "j" letters as indexers.
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What's the best way to parse command line arguments? [closed]
...ere's a typical line to add an option to your parser:
parser.add_option('-q', '--query',
action="store", dest="query",
help="query string", default="spam")
It pretty much speaks for itself; at processing time, it will accept -q or --query as options, store the argument in ...
How to prevent caching of my Javascript file? [duplicate]
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Add a random query string to the src
You could either do this manually by incrementing the querystring each time you make a change:
<script src="test.js?version=1"></script>
Or if you are using a server side language, you ...
Inject service in app.config
...rying to do, so +1. But you are encountering this issue because you're not quite using resolves how they're designed.
resolve takes either the string of a service or a function returning a value to be injected. Since you're doing the latter, you need to pass in an actual function:
resolve: {
dat...
Automating “enter” keypresses for bash script generating ssh keys
... {edited} Also - you can't run the script more than once - it changes the questions to confirm you want to overwrite the existing _rsa keyfile (so a y or n needs to be supplied)
– Rudu
Sep 8 '10 at 13:23
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Text Editor which shows \r\n? [closed]
...aracters and replacing them with line breaks, see details at superuser.com/q/34451/169199
– Kai Noack
Jan 12 '15 at 15:37
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Web-scraping JavaScript page with Python
...vascript: Yay! Supports javascript
Scraping without JS support:
import requests
from bs4 import BeautifulSoup
response = requests.get(my_url)
soup = BeautifulSoup(response.text)
soup.find(id="intro-text")
# Result:
<p id="intro-text">No javascript support</p>
Scraping with JS support...
The term “Context” in programming? [closed]
I have been programming for some months now and a frequently used word is "context" in classes. Like ServletContext (Java), Activity (Android), Service (Java, Android), NSManagedContext (Objective-C, iOS).
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