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How to catch integer(0)?
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If it's specifically zero length integers, then you want something like
is.integer0 <- function(x)
{
is.integer(x) && length(x) == 0L
}
Check it with:
is.integer0(integer(0)) #TRUE
is.integer0(0L) #FALSE
is.integer0(...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
... Internet access. I cannot run Jekyll server without Internet. Is it a small bug?
2 Answers
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Disposing WPF User Controls
...sable, and I would like to ensure that its dispose method will always get called once the containing window/application is closed. However, UserControl is not disposable. I tried implementing the IDisposable interface and subscribing to the Unloaded event but neither get called when the host applica...
avoid page break inside row of table
...at you pointed out above - they have a unique display style, which doesn't allow for these CSS rules. However, the <td> and <th> tags within them usually do allow this kind of specification - and you can easily apply such rules to ALL child-<tr>'s and <td>'s using CSS as show...
iOS change navigation bar title font and color
...r anything to that respect. Do you know how to set the LargeTitle font globally ?
– iKK
Oct 17 '19 at 12:53
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How do I set the table cell widths to minimum except last column?
...t; s in it, they get spread out with equal length columns. However, I want all the columns except last to have as small a width as possible, without wrapping text.
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vertical alignment of text element in SVG
...aligned with the corresponding baseline of the parent. For example,
this allows alphabetic baselines in Roman text to stay aligned across
font size changes. It defaults to the baseline with the same name as
the computed value of the alignment-baseline property. That is, the
position of "ideo...
Where does Vagrant download its .box files to?
...d to store the .box temporarily whilst downloading but is deleted upon installation within Vagrant.
– Luke Peterson
May 14 '15 at 23:13
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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...ts, but in most situations should correspond to them).
You should additionally use the JPA annotation like @Column(nullable = false) to give the jpa provider hints to generate the right DDL for creating table columns with the database constraints you want. If you can or want to rely on a JPA provi...
How to do a safe join pathname in ruby?
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One thing to note. Ruby uses a "/" for file separator on all platforms, including Windows, so you don't actually need use different code for joining things together on different platforms. "C:/tmp/1.text" should work fine.
File.join() is your friend for joining paths together.
p...