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The Concept of 'Hold space' and 'Pattern space' in sed
...ll, let's see what the command does.
$ echo {a..d} | tr ' ' '\n' # Prints from 'a' to 'd' in each line
a
b
c
d
$ echo {a..d} | tr ' ' '\n' | sed -n '1!G;h;$p'
d
c
b
a
It reverses the input like tac command does.
sed reads line-by-line, so let's see what happens on the patten space and the hold s...
A TwoWay or OneWayToSource binding cannot work on the read-only property
...Way.
<TextBox Text="{Binding Path=MyProperty, Mode=OneWay}" />
or from code:
Binding binding = new Binding();
binding.Mode = BindingMode.OneWay;
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When should I use h:outputLink instead of h:commandLink?
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I find that hard to believe. Aside from hearsay/your own anecdotal evidence, do you have anything to support that?
– Matt Ball
Jun 20 '11 at 18:58
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How to copy yanked text to VI command prompt
...n paste it with shift-insert in the commandline.
Similarly, you can paste from the clipboard like this:
"*p
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In Ruby how do I generate a long string of repeated text?
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@Steven From Ruby's perspective, "0" * 999999 is treated as "0".*(999999) where * is a method in the String class. That method accepts numbers as valid arguments to perform string replication. When you reverse the expression, we get ...
What does “./bin/www” do in Express 4.x?
...have been removed so that they can be maintained and updated independently from the core Express (except the static middleware), thus they need to be called separately (what you see in app.js).
The bin/ directory serves as a location where you can define your various startup scripts. The www is an ...
Stop setInterval
I want to stop this interval in the error handler from running repeatedly. Is that possible, and if so, how?
6 Answers
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Automating “enter” keypresses for bash script generating ssh keys
...ted it before I posted it - it works fine, although it looks like the dash from ssh-keygen got dropped - did you add that back in? {edited} Also - you can't run the script more than once - it changes the questions to confirm you want to overwrite the existing _rsa keyfile (so a y or n needs to be s...
Java regex email
...ter@müller.de is valid
matteo@78.47.122.114 is valid
The regex is taken from this post: Mail::RFC822::Address: regexp-based address validation. The results should coincide with online version.
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Adding a regression line on a ggplot
...iction curve for any model that supports predict, such as non-linear npreg from package np.
Note: If you use scale_x_continuous or scale_y_continuous some values may be cutoff and thus geom_smooth may not work correctly. Use coord_cartesian to zoom instead.
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