the progress bar length is always changing when the idea console output.

[whaozl]

4798 / 36850 [=====>---------------------------------------] 13.02 % 1506/s 21s

17718 / 36850 [========================================>--------------------------------------------] 48.08 % 2040/s 9s

this length is always changing.

        val a=Array(1,2,3,4,5,6,7,8,9,10)
         var pb = new ProgressBar(a.length)
         //pb.showSpeed = true//默认true
        for (_ <- 1 to a.length) {
          pb.add(1)
          Thread.sleep(1500)
        }
        println("done")

        <repository>
		    <id>jitpack.io</id>
		    <url>https://jitpack.io</url>
		</repository>
		 <dependency>
            <groupId>com.github.matfax</groupId>
            <artifactId>pb-scala</artifactId>
            <version>v0.3.2</version>
        </dependency>