17 regular expressions

Time:2022-4-27

“^ \ D + $” / / non negative integer (positive integer + 0)
“^ [0-9] * [1-9] [0-9] * $” / / positive integer
“^ (- \ D +)| (0 +) $” / / non positive integer (negative integer + 0)
“^ – [0-9] * [1-9] [0-9] * $” / / negative integer
“^ -? \ D + $” / / integer
“^ \ D + (\. \ D +)? $” / / non negative floating point number (positive floating point number + 0)
“^ (([0-9] + \. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] * \. [0-9] +) | ([0-9] * [1-9] [0-9] *) $” / / positive floating point number
“^ (- \ D + (\. \ D +)?) | (0 + (\. 0 +)?) $” / / non positive floating-point number (negative floating-point number + 0)
“^ (- (([0-9] + \. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] * \. [0-9] +) | ([0-9] * [1-9] [0-9] *)) $” / / negative floating point number
“^ (-? \ D +) (\. \ D +)? $” / / floating point number
“^ [a-za-z] + $” / / a string of 26 English letters
“^ [A-Z] + $” / / a string composed of 26 uppercase letters
“^ [A-Z] + $” / / a string composed of 26 lowercase letters
“^ [a-za-z0-9] + $” / / a string consisting of numbers and 26 English letters
“^ \ W + $” / / a string consisting of numbers, 26 English letters or underscores
“^ [\ W -] + (\. [\ W -] +) * @ [\ W -] + (\. [\ W -] +) + $” / / email address
“^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$”  //url

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