Question

How to check if a string includes $sometext$ without numbers in JavaScript

Answer 1

function includeDollarSymbolText(text) {
    text = text.replace(/\$[a-z]+\$/gi, "");

    if (text.search(/\$/) != -1) {
        return false;
    }
    
    return true;
}


console.log(includeDollarSymbolText("abc xy $text$ z")); // ok
console.log(includeDollarSymbolText("abc xy $ text$ z")); // space
console.log(includeDollarSymbolText("abc xy $$ z")); // empty
console.log(includeDollarSymbolText("abc 100 $text$ z")); // ok
console.log(includeDollarSymbolText("abc $1000 $text$ z")); // open $
console.log(includeDollarSymbolText("abc xy $IBM$ z $Microsoft$")); // ok
console.log(includeDollarSymbolText("abc xy $F3$ z")); // include number
console.log(includeDollarSymbolText("abc xy $text z")); // missing close $



/*
run:

true
false
false
true
false
true
false
false

*/

 

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Answer 2

function includeDollarSymbolText(text) {
    matches = text.match(/\$[a-z]+\$|\$/gi);
    
    if (matches) {
        for (let i = 0; i < matches.length; i++) {
            if (matches[i] == '$') { 
                return false
            };
        }
    }

    return true;
}


console.log(includeDollarSymbolText("abc xy $text$ z")); // ok
console.log(includeDollarSymbolText("abc xy $ text$ z")); // space
console.log(includeDollarSymbolText("abc xy $$ z")); // empty
console.log(includeDollarSymbolText("abc 100 $text$ z")); // ok
console.log(includeDollarSymbolText("abc $1000 $text$ z")); // open $
console.log(includeDollarSymbolText("abc xy $IBM$ z $Microsoft$")); // ok
console.log(includeDollarSymbolText("abc xy $F3$ z")); // include number
console.log(includeDollarSymbolText("abc xy $text z")); // missing close $



/*
run:

true
false
false
true
false
true
false
false

*/

 

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