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Best practices for in-app database migration for Sqlite
...stringWithFormat:@"PRAGMA user_version = %d", DatabaseSchemaVersionLatest] UTF8String], NULL, NULL, NULL);
}
Here's [self database] method that lazily opens the database:
- (FMDatabase *)database {
if (!_databaseOpen) {
_databaseOpen = YES;
NSString *documentsDir = [NSSearchP...
PostgreSQL: Difference between text and varchar (character varying)
..." benchmarks (without any external script)
use any string_generator with UTF8
main benchmarks:
2.1. INSERT
2.2. SELECT comparing and counting
CREATE FUNCTION string_generator(int DEFAULT 20,int DEFAULT 10) RETURNS text AS $f$
SELECT array_to_string( array_agg(
substring(md5(random()::t...
Which encoding opens CSV files correctly with Excel on both Mac and Windows?
...
Here's the clincher on importing utf8-encoded CSV into Excel 2011 for Mac: Microsoft says: "Excel for Mac does not currently support UTF-8." Excel for Mac 2011 and UTF-8
Yay, way to go MS!
...
How to hash a password
...eHash(string input, string salt)
{
byte[] bytes = Encoding.UTF8.GetBytes(input + salt);
SHA256Managed sHA256ManagedString = new SHA256Managed();
byte[] hash = sHA256ManagedString.ComputeHash(bytes);
return Convert.ToBase64String(hash);
}
public...
MySQL: Large VARCHAR vs. TEXT?
...v.mysql.com/doc/refman/5.0/en/column-count-limit.html ]. If your column is utf8-encoded, that means a 3000-character varchar column can take up to 9000 bytes.
– Jan Fabry
Jan 7 '10 at 21:05
...
What exactly do “u” and “r” string flags do, and what are raw string literals?
...a') == sys.getsizeof(r'cioa') == sys.getsizeof(u'cioa') (Ubuntu 16.04 with UTF8 lang). Similarly, type('cioa') == type(r'cioa') == type(u'cioa'). BUT, the raw string interpolation makes a difference, so sys.getsizeof('\ncioa') == sys.getsizeof(u'\ncioa') != sys.getsizeof(r'\ncioa')
...
URL Encoding using C#
...acters such as ĀāĒē...).
Console.OutputEncoding = Encoding.UTF8;
// Will also need to set the console font (in the console Properties dialog) to a font
// that displays the extended character set correctly.
// The following fonts all display the...
Performance of foreach, array_map with lambda and array_map with static function
...ted Apr 2 '15 at 12:54
Michael Härtl
7,84455 gold badges2727 silver badges5353 bronze badges
answered Nov 8 '13 at 14:26
...
How can I remove the gloss on a select element in Safari on Mac?
...ppearance: none;
appearance: none;
background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' fill='%238C98F2'><polygon points='0,0 100,0 50,50'/></svg>") no-repeat;
background-size: 12px;
background-position: calc(100% - 20px)...
How to do error logging in CodeIgniter (PHP)
..._log($this->_errorMsg, 1, ADMIN_MAIL, "Content-Type: text/html; charset=utf8\r\nFrom: ".MAIL_ERR_FROM."\r\nTo: ".ADMIN_MAIL);
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