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How to rename a single column in a data.frame?
..., in general (more than once column)
nms <- c("col1.name", "col2.name", etc...)
setnames(DF, nms)
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Difference between JSON.stringify and JSON.parse
... often confuse JSON "string representation" and Object (or dict in Python, etc.).
– jbmusso
Dec 13 '18 at 12:56
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Explanation of the UML arrows
... enough. There are plenty of other arrows: generalization, realisation and etc. which have meaning to the diagram reader.
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How to remove leading and trailing white spaces from a given html string?
...aces" are, but trim will remove whitespace in general (newline, space, tab etc), not just the space character.
– bsa
Sep 2 '13 at 6:14
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Access denied for user 'test'@'localhost' (using password: YES) except root user
...If you are connecting to the MySQL using remote machine(Example workbench) etc., use following steps to eliminate this error on OS where MySQL is installed
mysql -u root -p
CREATE USER '<<username>>'@'%%' IDENTIFIED BY '<<password>>';
GRANT ALL PRIVILEGES ON * . * TO '<&...
How to make my font bold using css?
...element in html, which is great semantically (also good for screen readers etc.), which typically renders as bold text:
See here, some <strong>emphasized text</strong>.
Or you can use the font-weight css property to style any element's text as bold:
span { font-weight: b...
Easy way to concatenate two byte arrays
...sult = concat(a, b);
It will also work for concatenating 3, 4, 5 arrays, etc.
Doing it this way gives you the advantage of fast arraycopy code which is also very easy to read and maintain.
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What is the quickest way to HTTP GET in Python?
...ly after the read. But a with block would be clearer and safer for Jython, etc.
– sah
Dec 27 '13 at 21:05
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How to change a TextView's style at runtime
...View.setTypeface(null, Typeface.BOLD); // Typeface.NORMAL, Typeface.ITALIC etc.
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Save image from URL by paperclip
... is potentially insecure because a user could call user.picture_from_url('/etc/password'). It's probably fine in most situations though.
– David Tuite
Oct 11 '13 at 9:16
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