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What's the opposite of head? I want all but the first N lines of a file
Given a text file of unknown length, how can I read, for example all but the first 2 lines of the file? I know tail will give me the last N lines, but I don't know what N is ahead of time.
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How do I deal with certificates using cURL while trying to access an HTTPS url?
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This error is related to a missing package: ca-certificates. Install it.
In Ubuntu Linux (and similar distro):
# apt-get install ca-certificates
In CygWin via Apt-Cyg
# apt-cyg install ca-certificates
In Arch Linux (Raspberry Pi)
# pacman -S ca-certificat...
How to get number of entries in a Lua table?
Sounds like a "let me google it for you" question, but somehow I can't find an answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
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Code snippet or shortcut to create a constructor in Visual Studio
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Type "ctor" + TAB + TAB (hit the Tab key twice). This will create the default constructor for the class you are in:
public MyClass()
{
}
It seems that in some cases you will have to press TAB twice.
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Define all functions in one .R file, call them from another .R file. How, if possible?
... by source("xyz.R") (assuming that both these files are in your current working directory.
If abc.R is:
fooABC <- function(x) {
k <- x+1
return(k)
}
and xyz.R is:
fooXYZ <- function(x) {
k <- fooABC(x)+1
return(k)
}
then this will work:
> source("abc.R")
> s...
How do I clear/delete the current line in terminal?
...m using terminal and typing in a line of text for a command, is there a hotkey or any way to clear/delete that line?
14 Ans...
Simultaneously merge multiple data.frames in a list
...differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would do the job, but that's not the case...
Return JSON response from Flask view
...summary information. I want to return the results as a response from a Flask view. How do I return a JSON response?
15 Answ...
How to generate keyboard events in Python?
...2 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE = 0x0008
MAPVK_VK_TO_VSC = 0
# msdn.microsoft.com/en-us/library/dd375731
VK...
Efficiently replace all accented characters in a string?
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I can't speak to what you are trying to do specifically with the function itself, but if you don't like the regex being built every time, here are two solutions and some caveats about each.
Here is one way to do this:
function makeSort...