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How to add to an existing hash in Ruby
In regards to adding an key => value pair to an existing populated hash in Ruby, I'm in the process of working through Apress' Beginning Ruby and have just finished the hashes chapter.
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Auto-reload browser when I save changes to html file, in Chrome?
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I assume you're not on OSX? Otherwise you could do something like this with applescript:
http://brettterpstra.com/watch-for-file-changes-and-refresh-your-browser-automatically/
There is also a plugin for chrome called "auto refresh plus" where you...
How do I avoid capturing self in blocks when implementing an API?
I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...
How do I find the width & height of a terminal window?
As a simple example, I want to write a CLI script which can print = across the entire width of the terminal window.
9 Ans...
How do I remove a substring from the end of a string in Python?
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strip doesn't mean "remove this substring". x.strip(y) treats y as a set of characters and strips any characters in that set from the ends of x.
Instead, you could use endswith and slicing:
url = 'abcdc.com'
if url.endswith('.com'):
url = url[:-4]
Or using regu...
How can I add an item to a SelectList in ASP.net MVC
...tem at the beginning of a SelectList with the default value of 0 and the Text Value of " -- Select One --"
13 Answers
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Multiple columns index when using the declarative ORM extension of sqlalchemy
... sqlalchemy.Column class, we should use the class sqlalchemy.schema.Index to specify an index that contains multiple columns.
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Should “node_modules” folder be included in the git repository
...te in the comment:
Also worth noting, any modules that involve native extensions will not work architecture to architecture, and need to be rebuilt. Providing concrete justification for NOT including them in the repo.
s...
What is the fastest way to get the value of π?
...s that when a and b are "close enough" then (a + b)² / 4t will be an approximation of π. I'm not sure what "close enough" means, but from my tests, one iteration got 2 digits, two got 7, and three had 15, of course this is with doubles, so it might have an error based on its representation and the...
Copy to clipboard in Node.js?
...e operating system happens to be running. So if you wanted this to work on X for example, you would need bindings to Xlib and/or XCB. Xlib bindings for node actually exist: https://github.com/mixu/nwm. Although I'm not sure whether it gives you access to the X clipboard, you might end up writing you...