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HMAC-SHA1 in bash
...ctly what you're asking for, but there's no point in reinventing the wheel and writing a bash version.
You can simply use the openssl command to generate the hash within your script.
[me@home] echo -n "value" | openssl dgst -sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Or simply:
[...
What is boxing and unboxing and what are the trade offs?
...
from C# 3.0 In a Nutshell:
Boxing is the act of casting a value
type into a reference type:
int x = 9;
object o = x; // boxing the int
unboxing is... the reverse:
// unboxing o
object o = 9;
int x = (int)o;
...
SQLAlchemy: how to filter date field?
...this might be obvious to some - this ONLY works because the func.date does CAST on the column which removes the time from equation => this does NOT mean range with the time! This only works when time is NOT in the column - you must CAST it to Date like this, or make the column Date, once it's Dat...
What is the difference between int, Int16, Int32 and Int64?
...ample works that way: the first literal 1, the 2, and the 3 are implicitly cast to short to fit them in the array, while the second literal 1 is left as an ordinary int. (int)1 is not considered equal to (short)1, (short)2, (short)3, thus the result is -1.
– user565869
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SQL NVARCHAR and VARCHAR Limits
... the length of the varchar(n) string is greater than 4,000 characters the cast will be to nvarchar(4000) and truncation will occur.
Datatypes of string literals
If you use the N prefix and the string is <= 4,000 characters long it will be typed as nvarchar(n) where n is the length of the string...
Data binding to SelectedItem in a WPF Treeview
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The cast to TreeViewItem fails for me I assume because I am using a HierarchicalDataTemplate applied from resources by datatype. But if you remove ChangeSelectedItem, then binding to a viewmodel and retrieving the item works fine...
Get size of all tables in database
...S SchemaName,
p.rows,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
SUM(a.used_pages) * 8 AS UsedSpaceKB,
CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB,
...
How does a PreparedStatement avoid or prevent SQL injection?
...g. But the input parameters will be sent to the database & appropriate cast/conversions will be applied prior to creating an actual SQL statement.
To give you an example, it might try and see if the CAST/Conversion works.
If it works, it could create a final statement out of it.
SELECT * Fr...
How to avoid overflow in expr. A * B - C * D
...ere's a work-around that only relies on implementation-defined behavior of casting unsigned integer to signed integer. But this can be expected to work on almost every system today.
(long long)((unsigned long long)A * B - (unsigned long long)C * D)
This casts the inputs to unsigned long long wher...
Swapping two variable value without using third variable
...ks for all integer values (that includes pointers then, with some luck and casting). For the sake of completeness I would like to mention another less powerful algorithm with addition/subtraction:
A = A + B
B = A - B
A = A - B
Here you have to be careful of overflows/underflows, but otherwise it ...