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LaTeX table positioning
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edited Dec 14 '14 at 14:18
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How to succinctly write a formula with many variables from a data frame?
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There is a special identifier that one can use in a formula to mean all the variables, it is the . identifier.
y <- c(1,4,6)
d <- data.frame(y = y, x1 = c(4,-1,3), x2 = c(3,9,8), x3 = c(4,-4,-2))
mod <- lm(y ~ ., data = d...
How can I use a search engine to search for special characters? [closed]
... troubleshooting-related tasks, such as finding out what the variable "$-" is in perl, or searching for error output that is loaded with special characters.
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How to get the position of a character in Python?
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There are two string methods for this, find() and index(). The difference between the two is what happens when the search string isn't found. find() returns -1 and index() raises ValueError.
Using find()
>>> myString = 'Position of a character'
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Typing Enter/Return key using Python and Selenium?
... . I need to know how to do that with the Selenium type command as there is no button to click.
29 Answers
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How can I get the MAC and the IP address of a connected client in PHP?
... to know the MAC and the IP address of the connect clients, how can I do this in PHP?
16 Answers
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Git alias with positional parameters
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The most obvious way is to use a shell function:
[alias]
files = "!f() { git diff --name-status \"$1^\" \"$1\"; }; f"
An alias without ! is treated as a Git command; e.g. commit-all = commit -a.
With the !, it's run as its own command in...
How to get the client IP address in PHP [duplicate]
...['REMOTE_ADDR'] contains the real IP address of the connecting party. That is the most reliable value you can find.
However, they can be behind a proxy server in which case the proxy may have set the $_SERVER['HTTP_X_FORWARDED_FOR'], but this value is easily spoofed. For example, it can be set by ...
ASP.NET Web API OperationCanceledException when browser cancels the request
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This is a bug in ASP.NET Web API 2 and unfortunately, I don't think there's a workaround that will always succeed. We filed a bug to fix it on our side.
Ultimately, the problem is that we return a cancelled task to ASP.NET in ...
Why was the switch statement designed to need a break?
... the reason for requiring the break statement.
I believe it was simply a mistake, due largely because when C was designed there was not nearly as much experience with how these constructs would be used.
Peter Van der Linden makes the case in his book "Expert C Programming":
We analyzed the Sun...