Check range of Unicode Value of a character In Objective-c... If I have a character like "∆" how can I get the unicode value and then determine if it is in a certain range of values. For example if I want to know if a certain character is in the unicode range of U+1F300 to U+1F6FF Answer: NSString uses UTF-16 to store codepoints internally, so those in the range you're looking for (U+1F300 to U+1F6FF) will be stored as a surrogate pair (four bytes). Despite its name, characterAtIndex: (and unichar) doesn't know about codepoints

Placing Unicode character in CSS content value I have a problem. I have found the HTML code for the downwards arrow, ↓ (↓) Cool. Now I need to use it in CSS like so: nav a:hover {content:"&darr";} That obviously won't work since ↓ is an HTML symbol. There seems to be less info about these "escaped unicode" symbols that are used in css. There are other symbols like \2020 that I found but no arrows. What are the arrow codes? Solution : Why don't you just save/serve the CSS

What characters can be used for up/down triangle (arrow without stem) for display in HTML? I'm looking for a HTML or ASCII character which is a triangle pointing up or down so that I can use it as a toggle switch. I found ↑ (↑), and ↓ (↓) - but those have a narrow stem. I'm looking just for the HTML arrow "head". Answer: Unicode arrows heads: ▲ - U+25B2 BLACK UP-POINTING TRIANGLE ▼ - U+25BC BLACK DOWN-POINTING TRIANGLE ▴ - U+25B4 SMALL BLACK UP-POINTING TRIANGLE ▾ -

What's the difference between utf8_general_ci and utf8_unicode_ci Between utf8_general_ci and utf8_unicode_ci, are there any differences in terms of performance? Answer: These two collations are both for the UTF-8 character encoding. The differences are in how text is sorted and compared. Note: Since MySQL 5.5.3 you should use utf8mb4 rather than utf8. They both refer to the UTF-8 encoding, but the older utf8 had a MySQL-specific limitation preventing use of characters numbered above 0xFFFD. Accuracy utf8mb4_unicode_ci is based on the Unicode standard for sorting and comparison, which sorts accurately in a very wide