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How to validate GUID is a GUID
...UID is a 16-byte (128-bit) number, typically represented by a 32-character hexadecimal string. A GUID (in hex form) need not contain any alpha characters, though by chance it probably would. If you are targeting a GUID in hex form, you can check that the string is 32-characters long (after strippi...
How can I generate random alphanumeric strings?
... always the same and therefore not random, for example the 13 character in hex is always "4" - at least in a version 6 GUID.
This solution also lets you generate a string of any length.
Solution 2 - One line of code - good for up to 22 characters
Convert.ToBase64String(Guid.NewGuid().ToByteArray(...
When should we use Observer and Observable?
... String: "
+ Integer.toOctalString( subject.getState() ) );
}
}
HexaObserver.java
public class HexaObserver extends Observer{
public HexaObserver(Subject subject){
this.subject = subject;
this.subject.attach(this);
}
@Override
public void update() {
System.out.print...
Text Editor which shows \r\n? [closed]
....e. View, White sapce menu).
It also has an option to display the file in hex mode (i.e. Tools, Hex Dump menu).
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What does “dereferencing” a pointer mean?
... a 32-bit pointer at 0x2000, the memory content would be:
Memory Address (hex) Variable name Contents
1000 'a' == 97 (ASCII)
1001 'b' == 98
1002 'c' == 99
1003 ...
Emulate ggplot2 default color palette
...of colors. For example, an input of 3 would produce a character vector of HEX colors with these colors:
4 Answers
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How to correct TypeError: Unicode-objects must be encoded before hashing?
...
>>> hashlib.sha256(str(random.getrandbits(256)).encode('utf-8')).hexdigest()
'cd183a211ed2434eac4f31b317c573c50e6c24e3a28b82ddcb0bf8bedf387a9f'
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HMAC-SHA1 in bash
...shift 3
echo -n "$data" | openssl dgst "-$digest" -hmac "$key" "$@"
}
# hex output by default
hash_hmac "sha1" "value" "key"
# raw output by adding the "-binary" flag
hash_hmac "sha1" "value" "key" -binary | base64
# other algos also work
hash_hmac "md5" "value" "key"
...
JavaScript string encryption and decryption?
...rs = text => text.split('').map(c => c.charCodeAt(0));
const byteHex = n => ("0" + Number(n).toString(16)).substr(-2);
const applySaltToChar = code => textToChars(salt).reduce((a,b) => a ^ b, code);
return text => text.split('')
.map(textToChars)
.map(a...
What are all the escape characters?
...ces:
\u{0000-FFFF} /* Unicode [Basic Multilingual Plane only, see below] hex value
does not handle unicode values higher than 0xFFFF (65535),
the high surrogate has to be separate: \uD852\uDF62
Four hex characters only (no variable width) */
\...