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One line ftp server in python
Is it possible to have a one line command in python to do a simple ftp server? I'd like to be able to do this as quick and temporary way to transfer files to a linux box without having to install a ftp server. Preferably a way using built in python libraries so there's nothing extra to install.
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Getting the array length of a 2D array in Java
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Consider
public static void main(String[] args) {
int[][] foo = new int[][] {
new int[] { 1, 2, 3 },
new int[] { 1, 2, 3, 4},
};
System.out.println(foo.length); //2
System.out.println(foo[0].length); //3
System.out.println(foo[1].length); //4
}
Col...
Stack, Static, and Heap in C++
...rage duration. in global namespace scope
string globalA;
int main() {
foo();
foo();
}
void foo() {
// static storage duration. in local scope
static string localA;
localA += "ab"
cout << localA;
}
The program prints ababab, because localA is not destroyed upon exit ...
How to delete selected text in the vi editor
I am using PuTTY and the vi editor. If I select five lines using my mouse and I want to delete those lines, how can I do that?
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ActiveRecord OR query
.../ActiveRecord may support this syntax natively. It would look similar to:
Foo.where(foo: 'bar').or.where(bar: 'bar')
As noted in this pull request https://github.com/rails/rails/pull/9052
For now, simply sticking with the following works great:
Foo.where('foo= ? OR bar= ?', 'bar', 'bar')
Upda...
Rails: What's a good way to validate links (URLs)?
...owing host
http://invalid##host.com
but it will allow
http://invalid-host.foo
that is a valid host, but not a valid domain if you consider the existing TLDs. Indeed, the solution would work if you want to validate the hostname, not the domain because the following one is a valid hostname
http://ho...
How do I revert all local changes in Git managed project to previous state?
...l
$ touch a
$ git add .
$ git commit -m"Add file a" > /dev/null
$ echo 'foo' >> a
$ git commit -a -m"Append foo to a" > /dev/null
$ for i in b c d e; do echo $i >>a; git commit -a -m"Append $i to a" ;done > /dev/null
$ git reset --hard HEAD^^ > /dev/null
$ cat a
foo
b
c
$ git...
Is there a [Go to file…]?
In modern IDEs, there is a keyboard shortcut to open a file by typing its name without putting your hand on the mouse. For example:
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How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
Here is a simplified version of something I'm trying to run:
6 Answers
6
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is it possible to change values of the array when doing foreach in javascript?
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Array: [1, 2, 3, 4]
Result: ["foo1", "foo2", "foo3", "foo4"]
Array.prototype.map() Keep original array
const originalArr = ["Iron", "Super", "Ant", "Aqua"];
const modifiedArr = originalArr.map(name => `${name}man`);
console.log( "Original: %s", or...