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Defining a function with multiple implicit arguments in Scala
...g, p1)
}
implicit val iString= " world! "
implicit val iInt= 2019
myFun("Hello").apply
myFun("Hello")(" my friend! ").apply
myFun("Hello")(" my friend! ")(2020)
// Output is:
// Hello world! 2019
// Hello my friend! 2019
// Hello my friend! 2020
In Scala 3 (a.k.a. "Dotty", thoug...
How can I have a newline in a string in sh?
...
The solution is to use $'string', for example:
$ STR=$'Hello\nWorld'
$ echo "$STR" # quotes are required here!
Hello
World
Here is an excerpt from the Bash manual page:
Words of the form $'string' are treated specially. The word expands to
string, with backslash-escaped...
What is the difference between the kernel space and the user space?
...upt such as int 0x80 or syscall to signal the kernel. x86-64 Linux syscall hello world example:
.data
hello_world:
.ascii "hello world\n"
hello_world_len = . - hello_world
.text
.global _start
_start:
/* write */
mov $1, %rax
mov $1, %rdi
mov $hello_world, %rsi
mov $hell...
What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?
...example or run a program that uses the Python 2 print statement:
print "Hello, World!"
The statement above does not work in Python 3. In Python 3 you need to add parentheses around the value to be printed:
print("Hello, World!")
“SyntaxError: Missing parentheses in call to 'print'” i...
What's the difference between echo, print, and print_r in PHP?
...a single string
Returns 1, so it can be used in an expression
e.g. print "Hello"
or, if ($expr && print "foo")
print_r()
Outputs a human-readable representation of any one value
Accepts not just strings but other types including arrays and objects, formatting them to be readable
Useful...
How to replace innerHTML of a div using jQuery?
...
$("#regTitle").html("Hello World");
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When monkey patching an instance method, can you call the overridden method from the new implementat
...possible, you should prefer something like this:
class Foo
def bar
'Hello'
end
end
class ExtendedFoo < Foo
def bar
super + ' World'
end
end
ExtendedFoo.new.bar # => 'Hello World'
This works, if you control creation of the Foo objects. Just change every place which creates...
What is the difference between “text” and new String(“text”)?
...;
class Test {
public static void main(String[] args) {
String hello = "Hello", lo = "lo";
System.out.print((hello == "Hello") + " ");
System.out.print((Other.hello == hello) + " ");
System.out.print((other.Other.hello == hello) + " ");
System.out.print((h...
How to disallow temporaries
... Foo (const char*) {}
};
void Foo (float);
int main ()
{
Foo ("hello"); // error
class Foo a("hi"); // OK
return 1;
}
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What does %s mean in a python format string?
... really simple example:
#Python2
name = raw_input("who are you? ")
print "hello %s" % (name,)
#Python3+
name = input("who are you? ")
print("hello %s" % (name,))
The %s token allows me to insert (and potentially format) a string. Notice that the %s token is replaced by whatever I pass to the st...