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How to generate a random string in Ruby
...not use SecureRandom?
require 'securerandom'
random_string = SecureRandom.hex
# outputs: 5b5cd0da3121fc53b4bc84d0c8af2e81 (i.e. 32 chars of 0..9, a..f)
SecureRandom also has methods for:
base64
random_bytes
random_number
see: http://ruby-doc.org/stdlib-1.9.2/libdoc/securerandom/rdoc/SecureRa...
How to export/import PuTTy sessions list?
..."' | Out-File putty.reg -Append
} elseif ($propval -is [int]) {
$hex = "{0:x8}" -f $propval
'"' + "$prop" + '"' + "=dword:" + $hex | Out-File putty.reg -Append
}
}
"" | Out-File putty.reg -Append
}
import.ps1
$input_file = "putty.reg"
$content = Get-Content "$input_file"
...
How to overwrite the previous print to stdout in python?
.... Try this: import curses; curses.setupterm(fd=sys.stdout.fileno()); print(hex(curses.tigetstr('cr'))); It should print the hex codes of the character sequence to go to the start of the line.
– Mike DeSimone
Mar 22 '17 at 13:30
...
How can I get device ID for Admob
...tes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < messageDigest.length; i++) {
String h = Integer.toHexString(0xFF & messageDigest[i]);
while (h.length(...
What's the difference between a temp table and table variable in SQL Server?
...ete
COMMIT
BEGIN TRAN EndBatch
SAVE TRAN EndBatch
COMMIT')
DECLARE @LSN_HEX NVARCHAR(25) =
CAST(CAST(CONVERT(varbinary,SUBSTRING(@LSN, 1, 8),2) AS INT) AS VARCHAR) + ':' +
CAST(CAST(CONVERT(varbinary,SUBSTRING(@LSN, 10, 8),2) AS INT) AS VARCHAR) + ':' +
CAST(CAST(CONVERT(...
How to print (using cout) a number in binary form?
...e about operating systems and we're learning how to convert from binary to hexadecimal, decimal to hexadecimal, etc. and today we just learned how signed/unsigned numbers are stored in memory using the two's complement (~number + 1).
...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...# ATTRIB: # ..snip..
Notice how even the a vector was copied (different hex value indicates new copy of vector), even though a wasn't changed. Even the whole of b was copied, rather than just changing the elements that need to be changed. That's important to avoid for large data, and why := and s...
How do you validate a URL with a regular expression in Python?
...#" | "%" |
reserved = ";" | "/" | "?" | ":" | "@" | "&" | "="
hex = digit | "A" | "B" | "C" | "D" | "E" | "F" |
"a" | "b" | "c" | "d" | "e" | "f"
escape = "%" hex hex
unreserved = alpha | digit | safe | extra
uchar = unreserved | escape
...
What's a 3D doing in this HTML?
...any non-standard email octets are represented as an = sign followed by two hex digits representing the octet's value. Of course, to represent a plain = in email, it needs to be represented using quoted-printable encoding too: 3D are the hex digits corresponding to ='s ASCII value (61).
...
Best way to generate random file names in Python
...
Or use uuid.uuid4().hex to get an hex string without dashes (-).
– Rockallite
Nov 6 '15 at 8:25
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