If you already have a byte array then you will need to know what type of encoding was used to make it into that byte array. For example, if the byte array was created like this: byte[] bytes = Encoding.ASCII.GetBytes(someString); You will need to turn it back into a string like this: string someString = … Read more
int n; bool isNumeric = int.TryParse(“123”, out n); Update As of C# 7: var isNumeric = int.TryParse(“123”, out int n); or if you don’t need the number you can discard the out parameter var isNumeric = int.TryParse(“123”, out _); The var s can be replaced by their respective types!
PHP strings can be specified not just in two ways, but in four ways. Single quoted strings will display things almost completely “as is.” Variables and most escape sequences will not be interpreted. The exception is that to display a literal single quote, you can escape it with a back slash \’, and to display … Read more
I would use filter: str_list = filter(None, str_list) str_list = filter(bool, str_list) str_list = filter(len, str_list) str_list = filter(lambda item: item, str_list) Python 3 returns an iterator from filter, so should be wrapped in a call to list() str_list = list(filter(None, str_list))
New Way: From Go 1.10 there is a strings.Builder type, please take a look at this answer for more detail. Old Way: Use the bytes package. It has a Buffer type which implements io.Writer. package main import ( “bytes” “fmt” ) func main() { var buffer bytes.Buffer for i := 0; i < 1000; i++ … Read more
Use the string’s .replace method with a regex of \D, which is a shorthand character class that matches all non-digits: myString = myString.replace(/\D/g,”);
You can use Character.toString(char). Note that this method simply returns a call to String.valueOf(char), which also works. As others have noted, string concatenation works as a shortcut as well: String s = “” + ‘s’; But this compiles down to: String s = new StringBuilder().append(“”).append(‘s’).toString(); which is less efficient because the StringBuilder is backed by … Read more
Without the 0x prefix, you need to specify the base explicitly, otherwise there’s no way to tell: x = int(“deadbeef”, 16) With the 0x prefix, Python can distinguish hex and decimal automatically: >>> print(int(“0xdeadbeef”, 0)) 3735928559 >>> print(int(“10”, 0)) 10 (You must specify 0 as the base in order to invoke this prefix-guessing behavior; if … Read more
To split on a string you need to use the overload that takes an array of strings: string[] lines = theText.Split( new string[] { Environment.NewLine }, StringSplitOptions.None ); Edit: If you want to handle different types of line breaks in a text, you can use the ability to match more than one string. This will … Read more
Adapted from Not So Frequently Asked Questions: #include <algorithm> #include <cctype> #include <string> std::string data = “Abc”; std::transform(data.begin(), data.end(), data.begin(), [](unsigned char c){ return std::tolower(c); }); You’re really not going to get away without iterating through each character. There’s no way to know whether the character is lowercase or uppercase otherwise. If you really hate … Read more