Use StringBuffer instead of string concatenation to improve performance - Node.js Object

Node.js examples for Object:Class Definition

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Description

Use StringBuffer instead of string concatenation to improve performance

Demo Code


function StringBuffer() {
  this.strings = []//from   w w w. j  ava2s  .  c om
  for (var idx = 0; idx < arguments.length; idx++)
    this.nextPutAll(arguments[idx])
}
StringBuffer.prototype.nextPutAll = function(s) { this.strings.push(s) }
StringBuffer.prototype.contents   = function()  { return this.strings.join("") }
String.prototype.writeStream      = function() { return new StringBuffer(this) }

// make Arrays print themselves sensibly

printOn = function(x, ws) {
  if (x === undefined || x === null)
    ws.nextPutAll("" + x)
  else if (x.constructor === Array) {
    ws.nextPutAll("[")
    for (var idx = 0; idx < x.length; idx++) {
      if (idx > 0)
        ws.nextPutAll(", ")
      printOn(x[idx], ws)
    }
    ws.nextPutAll("]")
  }
  else
    ws.nextPutAll(x.toString())
}

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