alphabetic and numeric characters

>>> crazystring = ' dade142.;! 0142f[.,]ad 'Keep Numbers only>>> filter (Str.isdigit, crazystring)' 1420142′Keep only Letters>>> filter (Str.isalpha, crazystring)' Dadefad 'Keep only letters and numbers>>> filter (Str.isalnum, crazystring)' Dade14201

3.3 Numeric data typesFrom the moment we open our eyes every morning, we deal with numbers almost every hour: from 6:30 on the alarm clock to the 216 bus to work, from the news that the house price fell to 100 yuan per square meter to go home to buy

3.3 Numeric data typesFrom the moment we open our eyes every morning, we deal with numbers almost every hour: from 6:30 on the alarm clock to the 216 bus to work, from the news that the house price fell to 100 yuan per square meter to go home to buy

Sequence Types There are six types of sequence: strings, byte sequences (bytes objects), byte arrays (ByteArray objects), list, tuple, Range objects. Common operations supported by the sequence type:Member check: in, not inConnection: +Copy:

Sequence Types There are six types of sequence: strings, byte sequences (bytes objects), byte arrays (ByteArray objects), list, tuple, Range objects. Common operations supported by sequence types:Member check: in, not inConnection: +Copy:

The numeric types in the above table are fixed-length, that is, regardless of the number of values you have stored, how big or how small, the size of the storage bytes used is constant. For example, the previously set int (1), although the M value

HTML5 the new number input type will call up the numeric keypad when the input box has the focus, increasing the effect of the experience. However, on some Android machines, you can switch the word input, and users will accidentally enter

The Char class is the character type provided by C #, which is the string type provided by C #.Character:The Char class represents a Unicode character in C #.The Char class defines only one Unicode character.The common methods and descriptions of

Character Describe \ The next character is marked with a special character, or a literal character, or a back reference, or an octal escape character. For example, ' n ' matches the character "n". ' \ n ' matches a line break.

function validpsw () {varPassword = $ (". Password"). Val (); varnum =0; varNumber =0 ; varLetter =0 ; varBigletter =0 ; varchars =0 ; if(Password.search (/[0-9]/) != -1) {num+=1; number=1; } if(Password.search (/[a-z]/)! =-1) {num+=1;