asskoala/CKG
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

first commit

Browse Source
This commit is contained in:
Jose Caban
2025-06-07 11:34:38 -04:00
commit 0eb2d7c07d
4708 changed files with 1500614 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
extern/stdcxx/4.2.1/doc/stdlibug/22-6.html vendored Normal file
View File

@@ -0,0 +1,55 @@
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed
with this work for additional information regarding copyright
ownership. The ASF licenses this file to you under the Apache
License, Version 2.0 (the License); you may not use this file
except in compliance with the License. You may obtain a copy of
the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. See the License for the specific language governing
permissions and limitations under the License.
Copyright 1999-2007 Rogue Wave Software, Inc.
-->
<HTML>
<HEAD>
<TITLE>Member Functions</TITLE>
<LINK REL=StyleSheet HREF="../rw.css" TYPE="text/css" TITLE="Apache stdcxx Stylesheet"></HEAD>
<BODY BGCOLOR=#FFFFFF>
<A HREF="22-5.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="22-7.html"><IMG SRC="images/bnext.gif" WIDTH=25 HEIGHT=21 ALT="Next file" BORDER=O></A><DIV CLASS="DOCUMENTNAME"><B>Apache C++ Standard Library User's Guide</B></DIV>
<H2>22.6 Member Functions</H2>
<A NAME="idx471"><!></A>
<P>The member functions of class <B><I><A HREF="../stdlibref/valarray.html">valarray</A></I></B> include the <SAMP>size()</SAMP> function, which returns the size of a <B><I>valarray</I></B>, and the <SAMP>sum()</SAMP> function, which returns the sum of all elements in a <B><I>valarray</I></B>. The functions <SAMP>min()</SAMP> and <SAMP>max()</SAMP> return, respectively, the minimum and maximum values in a <B><I>valarray</I></B>.</P>
<P>Class <B><I><A HREF="../stdlibref/valarray.html">valarray</A></I></B> also contains two shift functions. Both functions shift elements a specified number of steps to the left, where the <SAMP>0</SAMP><SUP>th</SUP> element is defined as the leftmost. The <SAMP>shift()</SAMP> function fills in at the right with <SAMP>0</SAMP>s or <SAMP>T()</SAMP>s. The <SAMP>cshift()</SAMP> function performs a circular shift or <I>rotation</I> so that the <SAMP>i</SAMP><SUP>th</SUP> element becomes the element at location <SAMP>self.length() - n - i</SAMP>, where <SAMP>i</SAMP> runs from <SAMP>0</SAMP> to <SAMP>n</SAMP>, and <SAMP>n</SAMP> is the number of steps to shift. Both functions return a new <B><I>valarray</I></B>, but the original is not changed. For example:</P>
<UL><PRE>
int a[5] = {1,2,3,4,5};
std::valarray&lt;int&gt; v(a,5);
std::valarray&lt;int&gt; v2 = v.shift(2); // v2 = {3,4,5,0,0}
v2 = v.cshift(2); // v2 = {3,4,5,1,2}
</PRE></UL>
<P>Class <B><I><A HREF="../stdlibref/valarray.html">valarray</A></I></B> provides two versions of the <SAMP>apply()</SAMP> function. These functions apply a user-specified function to each element in the array. Again, these return a new array with the result leaving the original array unaltered.</P>
<P>Finally, as we noted in the discussion on constructors, <B><I><A HREF="../stdlibref/valarray.html">valarray</A></I></B> has a resize function that allows a program to change the number of elements contained by that array. The original elements, if any, are lost in the process since the function re-initializes all elements in the newly-sized array.</P>
<BR>
<HR>
<A HREF="22-5.html"><IMG SRC="images/bprev.gif" WIDTH=20 HEIGHT=21 ALT="Previous file" BORDER=O></A><A HREF="noframes.html"><IMG SRC="images/btop.gif" WIDTH=56 HEIGHT=21 ALT="Top of Document" BORDER=O></A><A HREF="booktoc.html"><IMG SRC="images/btoc.gif" WIDTH=56 HEIGHT=21 ALT="Contents" BORDER=O></A><A HREF="tindex.html"><IMG SRC="images/bindex.gif" WIDTH=56 HEIGHT=21 ALT="Index page" BORDER=O></A><A HREF="22-7.html"><IMG SRC="images/bnext.gif" WIDTH=20 HEIGHT=21 ALT="Next file" BORDER=O></A>
<!-- Google Analytics tracking code -->
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-1775151-1";
urchinTracker();
</script>
<!-- end of Google Analytics tracking code -->
</BODY>
</HTML>