shift() is a built in Perl subroutine that takes an array as an argument, then returns and deletes the first item in that array. It is common practice to obtain all parameters passed into a subroutine with shift calls. For example, say you have a subroutine foo that takes three arguments. One way to get … Read more
IIRC I named it after the DIR command in DOS.
Using the power operator ** will be faster as it won’t have the overhead of a function call. You can see this if you disassemble the Python code: >>> dis.dis(‘7. ** i’) 1 0 LOAD_CONST 0 (7.0) 3 LOAD_NAME 0 (i) 6 BINARY_POWER 7 RETURN_VALUE >>> dis.dis(‘pow(7., i)’) 1 0 LOAD_NAME 0 (pow) 3 LOAD_CONST … Read more
The key information for getting a more useful help utility is actually included with Zsh, it’s just a matter of finding the critical—and poorly discoverable—man page: man zshcontrib (here on the web), which describes the run-help widget: By default, run-help is an alias for the man command, so this often fails when the command word … Read more
.Last.value is an answer. It was answered once but you have better title.
(This is longer than I intended; please bear with me.) Most languages are made up of something called a “syntax”: the language is comprised of several well-defined keywords, and the complete range of expressions that you can construct in that language is built up from that syntax. For example, let’s say you have a simple … Read more
You could always wrap the value in an array like int[] mutable = {1}; if including the code for a mutable wrapper class is too cumbersome.
No, but there are a few people who have written one, such as here. Another possibility is to use this: exp(mean(log(x)))
You could add pushd () { command pushd “$@” > /dev/null } popd () { command popd “$@” > /dev/null } to the top of each script. This is probably the minimum amount of work it will take to solve your problem.
Imagine the assembly code that would be generated from: if (__builtin_expect(x, 0)) { foo(); … } else { bar(); … } I guess it should be something like: cmp $x, 0 jne _foo _bar: call bar … jmp after_if _foo: call foo … after_if: You can see that the instructions are arranged in such an … Read more