18 lines
539 B
Markdown
18 lines
539 B
Markdown
### isLowerCase
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Checks if the provided argument contains anything else than the lowercase alphabets. If the second argument is provided to be true than numbers and other symbols are considered lowercase too.
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``` js
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const isLowerCase = (val,symbol = false) => {
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if (symbol) return val === val.toLowerCase()
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else return !(/[^a-z]/g.test(val))
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}
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```
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```js
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isUpperCase('abc'); //true
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isUpperCase('abc123@$'); //false
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isUpperCase('abc123@$',true); //true
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isUpperCase('abc123@$ABCD',true); //false
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isUpperCase('abc123@$ABCD'); //false
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```
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