escape() is defined in section B.2.1.2 escape and the introduction text of Annex B says: … All of the language features and behaviours specified in this annex have one or more undesirable characteristics and in the absence of legacy usage would be removed from this specification. … For characters, whose code unit value is 0xFF … Read more
First, let’s demonstrate that head is actually working correctly: $ printf ‘\xef\xbb\xbf’ >file $ head -c 3 file $ head -c 3 file | hexdump -C 00000000 ef bb bf |…| 00000003 Now, let’s create a working function has_bom. If your grep supports -P, then one option is: $ has_bom() { head -c3 “$1” | … Read more
This answer is outdated. For full emoji support, see this answer. As the character set, if you can, definitely UTF-8. As the collation – that’s a bit nasty for languages with special characters. There are various types of collations. They can all store all Umlauts and other characters, but they differ in how they treat … Read more
Machine code and binary are the same – a number system with base 2 – either a 1 or 0. But machine code can also be expressed in hex-format (hexadecimal) – a number system with base 16. The binary system and hex are very interrelated with each other, its easy to convert from binary to … Read more
Open the file in Notepad++ and click Encoding->Convert to UTF-8. (Do not click Encode in UTF-8 because it won’t actually convert the characters.)
Yes, you can be more specific. For example: CREATE DATABASE “scratch” WITH OWNER “postgres” ENCODING ‘UTF8’ LC_COLLATE = ‘en_US.UTF-8’ LC_CTYPE = ‘en_US.UTF-8’; Also I recommend to read the following pages about locales and collations in PostgreSQL: http://www.postgresql.org/docs/current/interactive/locale.html http://www.postgresql.org/docs/current/interactive/collation.html
The short answer to your question is “No, there aren’t.” « and » are not actually intended as direction arrows, despite their frequent usage as such. What they are actually intended for is hinted at by their entity names — they’re supposed to be “angled quotes”. Certain European countries (notably France) tend to use these … Read more
Pick a 8 or 9 digit number at random, say 839712541. Then, take your order number’s binary representation (for this example, I’m not using 2’s complement), pad it out to the same number of bits (30), reverse it, and xor the flipped order number and the magic number. For example: 1 = 000000000000000000000000000001 Flip = … Read more
Update 2019: the answer is now YES as of this proposal and JavaScript versions following ECMAScript 2019 (including) will be proper supersets. TL;DR The answer is “no”. There are cases when JSON object won’t be valid for JavaScript. JSON is NOT a JavaScript subset. “Little” difference JSON That is: due to JSON specification, you can … Read more
The Unicode Standard Version 8.0, Appendix C states: UCS-4 stands for “Universal Character Set coded in 4 octets.” It is now treated simply as a synonym for UTF-32, and is considered the canonical form for representation of characters in ISO 10646 (Universal Coded Character Set).