massCode
String
Byte by Size
This snippet returns the length of a string in bytes.
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const byteSize = str => new Blob([str]).size
Example
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byteSize('💪') // 4
byteSize('JavaScript') // 10
Capitalize
This snippet capitalizes the first letter of a string.
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const capitalize = ([first, ...rest]) => first.toUpperCase() + rest.join('')
Example
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capitalize('fooBar') // 'FooBar'
Capitalize Every Word
This snippet capitalizes the first letter of every word in a given string.
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const capitalizeEveryWord = str =>
str.replace(/\b[a-z]/g, char => char.toUpperCase())
Example
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capitalizeEveryWord('foo bar') // 'Foo Bar'
Decapitalize
This snippet turns the first letter of a string into lowercase.
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const decapitalize = ([first, ...rest]) => first.toLowerCase() + rest.join('')
Example
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decapitalize('FooBar') // 'fooBar'
Is String
This snippet can be used to check whether an argument is a string.
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const isString = val => typeof val === 'string'
Example
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isString('5') // true
Is Lower Case
This snippet can be used to determine whether a string is lower case.
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const isLowerCase = str => str === str.toLowerCase()
Example
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isLowerCase('some') // true
isLowerCase('RanDom') // false
Is Upper Case
This snippet can be used to check whether a string is upper case.
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const isUpperCase = str => str === str.toUpperCase()
Example
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isUpperCase('SOME') // true
isLowerCase('RanDom') // true
Reverse
This snippet can be used to reverse a string.
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const reverseString = str => [...str].reverse().join('')
Example
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reverseString('some') // 'meos'