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Creating an R dataframe row-by-row
...ke to construct a dataframe row-by-row in R. I've done some searching, and all I came up with is the suggestion to create an empty list, keep a list index scalar, then each time add to the list a single-row dataframe and advance the list index by one. Finally, do.call(rbind,) on the list.
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UITableView + Add content offset at top
...t similarly to above by making custom views for the section headers, especially if you just have one section, this could give you the look of a permanent offset.
I can post sample code if it sounds like either of those are what you are looking for.
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How to toggle a boolean?
Is there a really easy way to toggle a boolean value in javascript ?
6 Answers
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Read password from stdin
...s is what I just cooked up (wouldn't be surprised if you find similar code all over the place, though):
import getpass
def login():
user = input("Username [%s]: " % getpass.getuser())
if not user:
user = getpass.getuser()
pprompt = lambda: (getpass.getpass(), getpass.getpass('...
How to get an element by its href in jquery?
... starting with a certain URL, use the attribute-starts-with selector:
var allLinksToGoogle = $('a[href^="http://google.com"]');
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How to check if a string “StartsWith” another string?
...pt 6's String.prototype.startsWith() method, but it's not yet supported in all browsers. You'll want to use a shim/polyfill to add it on browsers that don't support it. Creating an implementation that complies with all the details laid out in the spec is a little complicated. If you want a faithful ...
Why is volatile needed in C?
...olatile variable.
There are at least three common reasons to use it, all involving situations where the value of the variable can change without action from the visible code: When you interface with hardware that changes the value itself; when there's another thread running that also uses the ...
How to check if an object is serializable in C#
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You have a lovely property on the Type class called IsSerializable.
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How to get the last element of a slice?
...eft it outside consciously. It was non-obvious and prone to errors. Go overall is circumspect about 'too much meaning'; it also doesn't feature method/operator overloading, default values for function params, etc. which IMHO goes in a similar philosophical vein. See this discussion and others: group...
(![]+[])[+[]]… Explain why this works
... @rlemon, there's no int data type on the language, in fact all numbers are double-precision 64-bit format (IEEE 754 values), even though some operators work internally with Integer values (like the bitwise operators) the result is always a double. The 'i' comes in this example from u...