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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.
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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?
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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');
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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?
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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's the difference between :: (double colon) and -> (arrow) in PHP?
...ynamic context, ie. when you deal with some instance of some class:
class Hello {
public function say() {
echo 'hello!';
}
}
$h = new Hello();
$h->say();
By the way: I don't think that using Symfony is a good idea when you don't have any OOP experience.
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In-place edits with sed on OS X
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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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Const in JavaScript: when to use it and is it necessary?
...s
That is wrong. Mutating a variable is different from reassigning:
var hello = 'world' // assigning
hello = 'bonjour!' // reassigning
With const, you can not do that:
const hello = 'world'
hello = 'bonjour!' // error
But you can mutate your variable:
const marks = [92, 83]
marks.push(95)
c...
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_...