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What is the benefit of using $() instead of backticks in shell scripts?
...> parent=$(basename $(dirname $PWD))
pax> echo $parent
xyzzy
(a) Now that specific command may not actually work, I haven't tested the functionality. So, if you vote me down for it, you've lost sight of the intent :-) It's meant just as an illustration as to how you can nest, not as a bug-...
Using Python 3 in virtualenv
... location related concerns, relocatable was removed as an option.... is it now unnecessary? is their a workaround? or is it just now completely useless to prepare an app?
– J. M. Becker
Sep 27 '16 at 21:33
...
What is the difference between is_a and instanceof?
... must accept an Object as the first argument, but PHP versions >= 5.3.9 now accept an optional third boolean argument $allow_string (defaults to false) to allow comparisons of string class names instead:
class MyBaseClass {}
class MyExtendingClass extends MyBaseClass {}
// Original behavior, ev...
Unique (non-repeating) random numbers in O(1)?
...er at the position r with the number at position max and return the number now at position max. Decrement max by 1 and continue. When max is 0, set max back to the size of the array - 1 and start again without the need to reinitialize the array.
Update:
Although I came up with this method on my o...
SQL JOIN and different types of JOINs
...n and intersection is same as inner join which is not correct as far as I know.
– mightyWOZ
Jun 16 '17 at 5:13
1
...
Practical use of `stackalloc` keyword
...only be stored into a pointer local variable. As of C# 7.2, stackalloc can now be used as part of an expression and can target a span, and that can be done without using the unsafe keyword. Thus, instead of writing
Span<byte> bytes;
unsafe
{
byte* tmp = stackalloc byte[length];
bytes = ne...
Proper way to wait for one function to finish before continuing?
...ne!');
});
}
As per @Janaka Pushpakumara's suggestion, you can now use arrow functions to achieve the same thing. For example:
firstFunction(() => console.log('huzzah, I\'m done!'))
Update: I answered this quite some time ago, and really want to update it. While callbacks are abso...
How to pass an array into a SQL Server stored procedure
...ist READONLY
AS
BEGIN
SET NOCOUNT ON;
SELECT ID FROM @List;
END
GO
Now in your C# code:
// Obtain your list of ids to send, this is just an example call to a helper utility function
int[] employeeIds = GetEmployeeIds();
DataTable tvp = new DataTable();
tvp.Columns.Add(new DataColumn("ID", ...
How to hide image broken Icon using only CSS/HTML?
...
There is no way for CSS/HTML to know if the image is broken link, so you are going to have to use JavaScript no matter what
But here is a minimal method for either hiding the image, or replacing the source with a backup.
<img src="Error.src" onerror="t...
How to prevent that the password to decrypt the private key has to be entered every time when using
...d: /c/Users/starmonkey/.ssh/id_dsa (/c/Users/starmonkey/.ssh/id_dsa)
And now I can ssh to other servers without logging in every time.
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