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Full Discussion: Perl - Parentheses & Context confusion
Top Forums Shell Programming and Scripting Perl - Parentheses & Context confusion Post 302374957 by skmdu on Thursday 26th of November 2009 03:53:51 AM
Old 11-26-2009
Code:
($a,$b)=(test)[1,4]; # 3,6
In the above statement it calls the function test, and takes the
return value of test as an array and return its 1st and 4th indexes.
so you are getting 3 and 6

($a,$b)=test[1,4]; # 2,3
In the above statement, it calls the function and returns the
array. since you assigned the return values to two scalar
you are getting first two index of array.

Here there is no meaning of giving [1,4].

You just try the following you will understand:
($a,$b)= test => will give 2 and 3
($a,$b)= test[4,5] => will give 2 and 3
It will give only 0 and 1st index irrespective of index 
you give here.

 

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LEARN ABOUT CENTOS

glscissorindexed

GLSCISSORINDEXED(3G)						   OpenGL Manual					      GLSCISSORINDEXED(3G)

NAME

       glScissorIndexed - define the scissor box for a specific viewport

C SPECIFICATION

       void glScissorIndexed(GLuint index, GLint left, GLint bottom, GLsizei width, GLsizei height);

       void glScissorIndexedv(GLuint index, const GLint *v);

PARAMETERS

       index
	   Specifies the index of the viewport whose scissor box to modify.

       left, bottom
	   Specify the coordinate of the bottom left corner of the scissor box, in pixels.

       width, height
	   Specify ths dimensions of the scissor box, in pixels.

       v
	   For glScissorIndexedv, specifies the address of an array containing the left, bottom, width and height of each scissor box, in that
	   order.

DESCRIPTION

       glScissorIndexed defines the scissor box for a specified viewport.  index specifies the index of scissor box to modify.	index must be less
       than the value of GL_MAX_VIEWPORTS. For glScissorIndexed, left, bottom, width and height specify the left, bottom, width and height of the
       scissor box, in pixels, respectively. For glScissorIndexedv, v specifies the address of an array containing integers specifying the lower
       left corner of the scissor box, and the width and height of the scissor box, in that order.

       To enable and disable the scissor test, call glEnable() and glDisable() with argument GL_SCISSOR_TEST. The test is initially disabled for
       all viewports. While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window
       coordinates have integer values at the shared corners of frame buffer pixels.  glScissor(0,0,1,1) allows modification of only the lower
       left pixel in the window, and glScissor(0,0,0,0) doesn't allow modification of any pixels in the window.

       When the scissor test is disabled, it is as though the scissor box includes the entire window.

ERRORS

       GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_MAX_VIEWPORTS.

       GL_INVALID_VALUE is generated if any width or height specified in the array v is negative.

ASSOCIATED GETS

       glGet() with argument GL_SCISSOR_BOX

       glIsEnabled() with argument GL_SCISSOR_TEST

SEE ALSO

       glEnable(), glScissor(), glScissorArray()

COPYRIGHT

       Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						      GLSCISSORINDEXED(3G)
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