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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.
...
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/...
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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...
How can I show dots (“…”) in a span with hidden overflow?
...substring(0,limit) + dots;
}
return string;
}
call like
add3Dots("Hello World",9);
outputs
Hello Wor...
See it in action here
function add3Dots(string, limit)
{
var dots = "...";
if(string.length > limit)
{
// you can also use substr instead of substring
string = stri...
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'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.
...
Set color of TextView span in Android
...Background Color
SpannableString spannableString = new SpannableString("Hello World!");
BackgroundColorSpan backgroundSpan = new BackgroundColorSpan(Color.YELLOW);
spannableString.setSpan(backgroundSpan, 0, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableS...