This question already has answers here:
NSArray from NSCharacterSet
(9 answers)
Closed 7 years ago.
When I'm trying
print(NSCharacterSet.URLQueryAllowedCharacterSet())
it prints
<__NSCFCharacterSet: 0x1759b900>
How do I make it more informative?
You can get a representation of the character set using bitmapRepresentation which could be queried. Or you could do basically the same thing with a loop over all characters and using characterIsMember:. The output is potentially big...
There isn't really a simple option or a generic concise output to what you're asking for. It isn't a common requirement.
Related
This question already has answers here:
Special characters in Flutter
(6 answers)
Closed 2 years ago.
I would like to use a dollar sign in a flutter, how can I do this?
like this:
Text('$21.99')
Use Escape Sequence Character,
Text('\$21.99')
You can use raw string by suffixing r.
Like this
Text(r'$21.99')
This question already has an answer here:
Learning Regular Expressions [closed]
(1 answer)
Closed 4 years ago.
i need some help to write correct regex validation. I want password with no spaces, min. 6 symbols, doesn't matter numbers or letters or symbols. Alphabet a-zA-Z and а-яА-Я(RU). How i can do that?
"^(?=.*[A-Za-z])(?=.*\\d)[A-Za-z\\d]{6,}$"
You can take a look at this link
This question already has answers here:
Remove nth character from string
(4 answers)
Closed 4 years ago.
I'm trying to remove the third character from a string. however, there does not seem to be a clean way to do this. I couldn't find an extension that does this and using a library is a bit overkill
I probably could take the first start range up to this character, then the last range and concatenating these together feels quite wrong and there must be a better way IMO
Any help is appreciated!, Thanks!
You can do that the below way:
var str = "I am Bla Bla"
if str.count > 2 {
str.remove(at: String.Index(encodedOffset: 2))
print(str)
}
Hope this helps.
This question already has answers here:
Swift string formula into a real calculation
(3 answers)
Swift - Resolving a math operation in a string
(4 answers)
Closed 6 years ago.
How can I eval a string in Swift?
My strings are composed by numbers and logic operators.
Some examples are:
"2+2"
"2%2"
"2+2"
"2=3"
"2>3"
"2/5"
I've thought, if is too complex to write a function to do this, to parse a string and execute that as external process in bin/bash process than read a result. Any ideas?
Other questions, like this, are solution if there are only arithmetics operators. In my cases appears bool operators that returns error in NSExpression eval.
This question already has answers here:
How can I convert ereg expressions to preg in PHP?
(4 answers)
Closed 8 years ago.
eregi_replace('[0-9]+\.+[0-9]','',$cart['unit']);
How to change it to preg_replace?
I get an error: Warning: preg_replace() [function.preg-replace]: Unknown modifier '+' in ---
You can use your existing Regex almost unchanged in a preg_replace(). Just add delimiters and a case-insensitive modifier. You get
preg_replace('#[0-9]+\.+[0-9]#i','',$cart['unit']);
In fact, the case-sensitivity is irrelevant since your pattern only matches 0-9 and .