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In-place edits with sed on OS X
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When I try that on mac, I get an error that says "sed: -i may not be used with stdin".
– Christopher Bradshaw
Aug 12 at 23:38
add a c...
function declaration isn't a prototype
...ly call testlib with one or more arguments, the compiler will diagnose the error.
(C++ has slightly different rules. C++ doesn't have old-style function declarations, and empty parentheses specifically mean that a function takes no arguments. C++ supports the (void) syntax for consistency with C. B...
Immediate Child selector in LESS
...amp;:hover is essential over :hover otherwise it would result in syntactic error. However, there is no such syntactic requirement for using '&' here. Otherwise all nestings would require '&' as they are essentially referring to parent.
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Right way to reverse pandas.DataFrame?
...index):
print(idx, data.Even[idx], data.Odd[idx])
You are getting an error because reversed first calls data.__len__() which returns 6. Then it tries to call data[j - 1] for j in range(6, 0, -1), and the first call would be data[5]; but in pandas dataframe data[5] means column 5, and there is ...
Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets
...ured out how to get the correct positioning without resorting to trial and error.
The general idea is here at this question, but that was if you wanted both text and image centered. We don't want the image and text to be centered individually, we want the image and the text to be centered together...
Referring to a file relative to executing script
... with $BASH_SOURCE in cases where it will work for you, as you get a handy error condition when it fails to expand properly.
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C# code to validate email address
...n top-level domains, check the domain for an MX record, check for spelling errors from common domain names (gmail.cmo), etc. Then present a warning giving the user a chance to say "yes, my mail server really does allow ???????????? as an email address."
As for using exception handling for busines...
Parse string to date with moment.js
...'YYYY/MM/DD'); alert(date); alert(dateCalendarPart); Gives an invalid date error?????
– Andrew Day
Jun 15 '16 at 11:17
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How can I manipulate the strip text of facet_grid plots?
...th strings that looks like
c("median_something", "aggregated_average_x","error","something_else")
I simply do:
reformat <– function(x,lab="\n"){ sapply(x, function(c){ paste(unlist(strsplit(as.character(c) , split="_")),collapse=lab) }) }
[perhaps there are better definitions of reformat...
Why does the is operator return false when given null?
... will I successfully get a T ?
Now, while you can cast null to T without error, after doing so you don't "have a T" - you've still got nothing. So it's not the case that null "is" a T, so is returns false.