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Removing duplicate rows in Notepad++
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More powerful than excel.
– Vasu
Apr 22 '15 at 21:58
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What is the best way to exit a function (which has no return value) in python before the function en
...ggest:
def foo(element):
do something
if not check: return
do more (because check was succesful)
do much much more...
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Test if characters are in a string
...unction
grepl(value, chars, fixed = TRUE)
# TRUE
Use ?grepl to find out more.
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Regex lookahead for 'not followed by' in grep
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Negative lookahead, which is what you're after, requires a more powerful tool than the standard grep. You need a PCRE-enabled grep.
If you have GNU grep, the current version supports options -P or --perl-regexp and you can then use the regex you wanted.
If you don't have (a suffic...
Is it pythonic to import inside functions?
...o the import where it's needed and then if the code stays I'll make things more permanent by moving the import line to the top of the file.
One other point, I prefer to get an ImportError exception before any code is run -- as a sanity check, so that's another reason to import at the top.
I use p...
What is the difference between RegExp’s exec() function and String’s match() function?
...'/a/b/c/d')) {
// match is now the next match, in array form.
}
// No more matches.
String.match does this for you and discards the captured groups.
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Matching a space in regex
... for a space, that would be " " (one space).
If you're looking for one or more, it's " *" (that's two spaces and an asterisk) or " +" (one space and a plus).
If you're looking for common spacing, use "[ X]" or "[ X][ X]*" or "[ X]+" where X is the physical tab character (and each is preceded by a...
How to modify existing, unpushed commit messages?
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…however, this can make multi-line commit messages or small corrections more cumbersome to enter.
Make sure you don't have any working copy changes staged before doing this or they will get committed too. (Unstaged changes will not get committed.)
Changing the message of a commit that you've alre...
How to initialize all members of an array to the same value?
...doesn't necessarily mean "all-bits-zero", so using the above is
better and more portable than memset(). (Floating point values will be
initialized to +0, pointers to null value, etc.)
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What is the difference between and ?
...s an element of last resort, for when no other element is suitable. Use of more appropriate elements instead of the <div> element leads to better accessibility for readers and easier maintainability for authors.
(https://www.w3.org/TR/html/grouping-content.html#the-div-element)
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