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Full Discussion: unary operator expected
Top Forums Shell Programming and Scripting unary operator expected Post 302295013 by Corona688 on Friday 6th of March 2009 10:16:55 AM
Old 03-06-2009
If $j has no value at all, the expression will be invalid because it will vanish entirely, making it look like just [ -j 50 ]. Wrap $j in double-quotes and it won't vanish, becoming [ "" -lt 50 ] , which still isn't altogether sensible -- comparing a blank string to an integer -- but at least has correct syntax.
 

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LEARN ABOUT DEBIAN

krank

krank(6)																  krank(6)

NAME

       Krank - is a game of dexterity where you match stones together.

SYNOPSIS

       krank

       krank -f - start in fullscreen mode

       krank -w - start in windowed mode

       krank -s 800x600 - start in screen with size 800x600

       krank -f -s 800x600 - start in screen with size 800x600 and in fullscreen mode

       krank -w -s 800x600 - start in screen with size 800x600 and in windowed mode

       krank -h - display the helpscreen.

DESCRIPTION

       krank  is  a  game  of  dexterity,  being  somewhere between Breakout and billiard, where the aim of each level is to shove floating stones
       towards compatible static stones. You control a short chain of stones with your mouse to achieve that.

       Krank contains the following elements:

	   the snake
	       - follows your mouse or the analog stick of your joypad.
	   the balls
	       - move if you touch them with the snake or another ball.
	   the links
	       - are like balls, but they bond together if they touch each other.
	   the stones
	       - never move and do nothing else.
	   the magnets
	       - unmovable themselves, attract everything that moves. the number of circles rotating around them indicates how many items may  get
	       captured in them.

	       A magnet will vanish if:
		    - it captured at least as many balls as circles are rotating around it;
		    - all the captured balls have the same color as the magnet;
		    - it stayed for 3 seconds in the above condition.

	       If a magnet is fully loaded, but includes links or balls of a different color, it will explode, but not vanish.

	   the anchors
	       - never move, but bond together with links. the number of circles rotating around them indicates how many links may bond with them.

	       An anchor will vanish if:
		    - it is connected to as many other anchors as circles are rotating around it;
		    - all the connected anchors and links have the same color as the anchor;
		    - all other anchors of the same color are fully connected.

	       If all the above conditions are valid for 3 seconds, those anchors will be removed.

	       If an anchor is connected to another anchor, but the connecting chain includes links of a different color, it will explode, but not
	       vanish.

	   A connection between two links will be broken if one link is touched by a ball or captured by a magnet.

	   For each level you solve, there will be two more levels available to play, so you can skip levels you don't like.

AIM

       The aim of each level is to remove all anchors and magnets.

CONTROLS

       <Space> or 'p' or <Pause> - Game pause.

       <Esc> - Exit from level/game

       <Shift>+<Esc> - Quick exit

       <Right Arrow> - Next level

       <Left Arrow> - Previous Level

       <PageUp>/<PageDown> - Increase/decrease music volume.

       <ALT>+<PageUp>/<PageDown> - Increase/decrease sound volume.

krank																	  krank(6)
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