The Buffer class is a subclass of JavaScript's Uint8Array class andĮxtends it with methods that cover additional use cases.
What makes Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() "unsafe"?īuffer objects are used to represent a fixed-length sequence of bytes.The -zero-fill-buffers command-line option.om(), Buffer.alloc(), and Buffer.allocUnsafe().buf.writeUIntLE(value, offset, byteLength).buf.writeUIntBE(value, offset, byteLength).buf.writeIntLE(value, offset, byteLength).buf.writeIntBE(value, offset, byteLength).Static method: Buffer.isEncoding(encoding).Static method: Buffer.allocUnsafeSlow(size).Static method: Buffer.allocUnsafe(size).If the last character is not a number, it will not replace. Str.replace( /\d$/, '') // Masteringjs.io let str2 = 'Masteringjs.io0F'
With replace(), you can specify if the last character should be removed depending on what it is with a regular expression.įor example, suppose you want to remove the last character only if the last character is a number. Str.replace( /.$/, '') // Masteringjs.io Advanced Features
Str.substr( 0, str.length - 1) // Masteringjs.io Str.substring( 0, str.length - 1) // Masteringjs.io replace(/.$/, '') replaces the last character of the string with an empty string. Using /.$/ as the regular expression argument matches the last character of the string, so. Replace() takes either a string or a regular expression as its pattern argument. Substring() does not have negative indexing, so be sure to use str.length - 1 when removing the last character from the string. Slice() is generally easier, however other methods available are substring() and replace(). Str.slice( 0, -1) // Masteringjs.io Alternative Methods Slice() supports negative indexing, which means that slice(0, -1) is equivalent to slice(0, str.length - 1). It takes two arguments: the start index and the end index. To remove the last character from a string in JavaScript, you should use the slice() method.
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