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How do I comment on the Windows command line?
...ld go. For example, only the second of these two will echo the single word hello:
echo hello rem a comment.
echo hello & rem a comment.
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How to split a string, but also keep the delimiters?
...+, part);
}
}
}
/*
Example:
> java Splitter "\W+" "Hello World!"
Part 1: "Hello"
Part 2: " "
Part 3: "World"
Part 4: "!"
Part 5: ""
*/
I don't really like the other way, where you get an empty element in front and back. A delimiter is usually not at the ...
Replace one character with another in Bash
...
You could use tr, like this:
tr " " .
Example:
# echo "hello world" | tr " " .
hello.world
From man tr:
DESCRIPTION
Translate, squeeze, and/or delete characters from standard input, writ‐
ing to standard output.
...
What is the native keyword in Java for?
...up.
The official NDK repository contains "canonical" examples such as the hello-jni app:
https://github.com/googlesamples/android-ndk/blob/4df5a2705e471a0818c6b2dbc26b8e315d89d307/hello-jni/app/src/main/java/com/example/hellojni/HelloJni.java#L39
https://github.com/googlesamples/android-ndk/blob/...
How to print to console using swift playground?
...ge swift, but I don't understand why the bar on the right is only showing "Hello, playground" and not "Hello, world". Can someone explain why the println isn't being printed on the right?
...
jQuery using append with effects
...l 'show' on the new child
This works for me:
var new_item = $('<p>hello</p>').hide();
parent.append(new_item);
new_item.show('normal');
or:
$('<p>hello</p>').hide().appendTo(parent).show('normal');
...
Using the RUN instruction in a Dockerfile with 'source' does not work
... -command Write-Host default
# Executed as powershell -command Write-Host hello
SHELL ["powershell", "-command"]
RUN Write-Host hello
# Executed as cmd /S /C echo hello
SHELL ["cmd", "/S"", "/C"]
RUN echo hello
The following instructions can be affected by the SHELL instruction
when the sh...
How to send only one UDP packet with netcat?
...
If you are using bash, you might as well write
echo -n "hello" >/dev/udp/localhost/8000
and avoid all the idiosyncrasies and incompatibilities of netcat.
This also works sending to other hosts, ex:
echo -n "hello" >/dev/udp/remotehost/8000
These are not "real" devices ...
What does map(&:name) mean in Ruby?
...c
proc { |receiver| receiver.send *self }
end
end
# And then...
[ 'Hello', 'Goodbye' ].map &[ :+, ' world!' ]
#=> ["Hello world!", "Goodbye world!"]
Ampersand & works by sending to_proc message on its operand, which, in the above code, is of Array class. And since I defined #to_...
In-place edits with sed on OS X
...
This creates backup files. E.g. sed -i -e 's/hello/hello world/' testfile for me, creates a backup file, testfile-e, in the same dir.
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