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Checking for an empty field with MySQL
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An empty field can be either an empty string or a NULL.
To handle both, use:
email > ''
which can benefit from the range access if you have lots of empty email record (both types) in your table.
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Efficient method to generate UUID String in JAVA (UUID.randomUUID().toString() without the dashes)
...ique sequences of bytes. UUID is a good candidate but UUID.randomUUID().toString() generates stuff like 44e128a5-ac7a-4c9a-be4c-224b6bf81b20 which is good, but I would prefer dash-less string.
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Allow multiple roles to access controller action
...you need to authorize. If you have more than one, you're duplicating those string constants (yuck). I much prefer the static class that has the role names. My pet hate is duplicate strings... so so bad.
– robnick
Aug 17 '18 at 0:55
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How to save MailMessage object to disk as *.eml or *.msg file
...m, but it works.
public static void SaveMailMessage(this MailMessage msg, string filePath)
{
using (var fs = new FileStream(filePath, FileMode.Create))
{
msg.ToEMLStream(fs);
}
}
/// <summary>
/// Converts a MailMessage to an EML file stream.
/// </summary>
/// <...
Join a list of strings in python and wrap each string in quotation marks
... @jamlak ok, repr just seemed safer to me incase you have quotes in your string.
– Meow
May 3 '17 at 23:29
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Generate random password string with requirements in javascript
I want to generate a random string that has to have 5 letters from a-z and 3 numbers.
18 Answers
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How to check if a string is a valid hex color representation?
...// regular function
function isHexColor (hex) {
return typeof hex === 'string'
&& hex.length === 6
&& !isNaN(Number('0x' + hex))
}
// or as arrow function (ES6+)
isHexColor = hex => typeof hex === 'string' && hex.length === 6 && !isNaN(Number...
Func delegate with no return type
...is this example
using System;
public class Program
{
private Func<string,string> FunctionPTR = null;
private Func<string,string, string> FunctionPTR1 = null;
private Action<object> ProcedurePTR = null;
private string Display(string message)
{
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How to print Unicode character in Python?
...rce code, you can use Unicode escape characters in the form \u0123 in your string, and prefix the string literal with 'u'.
Here's an example running in the Python interactive console:
>>> print u'\u0420\u043e\u0441\u0441\u0438\u044f'
Россия
Strings declared like this are Unicode-t...
How to generate string of a certain length to insert into a file to meet a file size criteria?
...nd how many files to generate. What I need help with is how to generate a string less than or equal to the required file size.
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