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Capture characters from standard input without waiting for enter to be pressed
...ng (I believe that's called "raw mode", as opposed to "cooked mode" - look into man stty). Curses would handle that for you in a portable manner, if I'm not mistaken.
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How to remove text from a string?
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var ret = "data-123".replace('data-','');
console.log(ret); //prints: 123
Docs.
For all occurrences to be discarded use:
var ret = "data-123".replace(/data-/g,'');
PS: The replace function returns a new string and leaves the original string unchanged, so use the function retu...
How do you create an asynchronous method in C#?
...the async keyword:
private static async Task<DateTime> CountToAsync(int num = 10)
{
for (int i = 0; i < num; i++)
{
await Task.Delay(TimeSpan.FromSeconds(1));
}
return DateTime.Now;
}
If your async method is doing CPU work, you should use Task.Run:
private static async Task...
Index of Currently Selected Row in DataGridView
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Use the Index property in your DGV's SelectedRows collection:
int index = yourDGV.SelectedRows[0].Index;
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Why Doesn't C# Allow Static Methods to Implement an Interface?
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Assuming you are asking why you can't do this:
public interface IFoo {
void Bar();
}
public class Foo: IFoo {
public static void Bar() {}
}
This doesn't make sense to me, semantically. Methods specified on an interface should be there to specify the contract for inte...
Can constructors be async?
...t an object that will be actually properly initialized at some undefined point in the future. That is, if you're lucky and the async initialization doesn't fail.
All this is just a guess. But it seems to me that having the possibility of an async constructor brings more trouble than it's worth.
If...
What's the difference between “mod” and “remainder”?
...r, but it might also be the modulus (i.e. always positive), because in C89 integer division was permitted to round towards negative infinity instead of towards 0. So in C89, -5 / 2 could be -2 with remainder -1, or -3 with remainder 1, the implementation just had to document which. C99 removed the f...
Retrieving the last record in each group - MySQL
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Here's the DDL for my Posts table:
CREATE TABLE `posts` (
`PostId` bigint(20) unsigned NOT NULL auto_increment,
`PostTypeId` bigint(20) unsigned NOT NULL,
`AcceptedAnswerId` bigint(20) unsigned default NULL,
`ParentId` bigint(20) unsigned default NULL,
`CreationDate` datetime NOT NULL,
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Version number comparison in Python
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Remove the uninteresting part of the string (trailing zeroes and dots), and then compare the lists of numbers.
import re
def mycmp(version1, version2):
def normalize(v):
return [int(x) for x in re.sub(r'(\.0+)*$','', v).spli...
Handling InterruptedException in Java
What is the difference between the following ways of handling InterruptedException ? What is the best way to do it?
7 Answ...