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Convert data.frame columns from factors to characters
... can create a logical vector of which columns are factors, and use that to selectively apply factor
f <- sapply(bobf, class) == "factor"
bobc[,f] <- lapply(bobc[,f], factor)
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Bash command to sum a column of numbers [duplicate]
... With bc -l you can even add up float numbers. With cut you can select columns from the input: cat input.txt | cut -d ' ' -f 8 | paste -sd+ | bc -l will add all float numbers in column 8 of the input (space being the field separator).
– Arne
Sep 24 '...
jQuery document.createElement equivalent?
...ng like $(string), jQuery will examine the string to make sure you want to select a html tag or create a new element. By using $.parseHTML(), you tell jQuery that you want to create a new element explicitly, so the performance may be a little better.
2.much more important thing is that you may suff...
How can I see the size of a GitHub repository before cloning it?
...ip ever worked, but in any case, doing so now only downloads the currently selected branch with no history.
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Filter LogCat to get only the messages from My Application in Android?
...essage from another libraries. It's like Android Studio current 'Show only selected' filter. Thanks!
– equiman
Jun 26 '18 at 23:24
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“Treat all warnings as errors except…” in Visual Studio
In Visual Studio, I can select the "Treat warnings as errors" option to prevent my code from compiling if there are any warnings. Our team uses this option, but there are two warnings we would like to keep as warnings.
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How do I force a favicon refresh?
...wing you will get an instant favicon refresh:
Hover over tab
Right Click
Select reload
Your favicon should now be refreshed
This is the easiest way I've found to refresh the favicon locally.
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How can I remove specific rules from iptables?
...ication
-D, --delete chain rulenum
Delete one or more rules from the selected chain.
There are two versions of this command:
the rule can be specified as a number in the chain (starting at 1 for the first rule) or a rule to match.
Do realize this command, like all other command(-A...
How do I automatically scroll to the bottom of a multiline text box?
...nged += (sender, e) =>
{
if (textBox.Visible)
{
textBox.SelectionStart = textBox.TextLength;
textBox.ScrollToCaret();
}
};
Internally, AppendText does something like this:
textBox.Select(textBox.TextLength + 1, 0);
textBox.SelectedText = textToAppend;
But there ...
Where is git.exe located?
...ere should be something like this:
Right click the row called GitHub, and select "Open file location".
A window should pop up, showing you where the file is.
There you go!
You can do this with any application, not just GitHub.
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