1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/tools/qstringlist.cpp:46 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>TQStringList Class</title>
<style type="text/css"><!--
fn { margin-left: 1cm; text-indent: -1cm; }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
body { background: #ffffff; color: black; }
--></style>
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr bgcolor="#E5E5E5">
<td valign=center>
<a href="index.html">
<font color="#004faf">Home</font></a>
| <a href="classes.html">
<font color="#004faf">All Classes</font></a>
| <a href="mainclasses.html">
<font color="#004faf">Main Classes</font></a>
| <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
| <a href="groups.html">
<font color="#004faf">Grouped Classes</font></a>
| <a href="functions.html">
<font color="#004faf">Functions</font></a>
</td>
<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQStringList Class Reference</h1>
<p>The TQStringList class provides a list of strings.
<a href="#details">More...</a>
<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when TQt is built with thread support.</p>
<p><tt>#include <<a href="qstringlist-h.html">qstringlist.h</a>></tt>
<p>Inherits <a href="qvaluelist.html">TQValueList</a><TQString>.
<p><a href="qstringlist-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn><a href="#TQStringList"><b>TQStringList</b></a> ()</li>
<li class=fn><a href="#TQStringList-2"><b>TQStringList</b></a> ( const TQStringList & l )</li>
<li class=fn><a href="#TQStringList-3"><b>TQStringList</b></a> ( const TQValueList<TQString> & l )</li>
<li class=fn><a href="#TQStringList-4"><b>TQStringList</b></a> ( const TQString & i )</li>
<li class=fn><a href="#TQStringList-5"><b>TQStringList</b></a> ( const char * i )</li>
<li class=fn>void <a href="#sort"><b>sort</b></a> ()</li>
<li class=fn>TQString <a href="#join"><b>join</b></a> ( const TQString & sep ) const</li>
<li class=fn>TQStringList <a href="#grep"><b>grep</b></a> ( const TQString & str, bool cs = TRUE ) const</li>
<li class=fn>TQStringList <a href="#grep-2"><b>grep</b></a> ( const TQRegExp & rx ) const</li>
<li class=fn>TQStringList & <a href="#gres"><b>gres</b></a> ( const TQString & before, const TQString & after, bool cs = TRUE )</li>
<li class=fn>TQStringList & <a href="#gres-2"><b>gres</b></a> ( const TQRegExp & rx, const TQString & after )</li>
</ul>
<h2>Static Public Members</h2>
<ul>
<li class=fn>TQStringList <a href="#fromStrList"><b>fromStrList</b></a> ( const TQStrList & ascii )</li>
<li class=fn>TQStringList <a href="#split-2"><b>split</b></a> ( const TQString & sep, const TQString & str, bool allowEmptyEntries = FALSE )</li>
<li class=fn>TQStringList <a href="#split-3"><b>split</b></a> ( const TQChar & sep, const TQString & str, bool allowEmptyEntries = FALSE )</li>
<li class=fn>TQStringList <a href="#split"><b>split</b></a> ( const TQRegExp & sep, const TQString & str, bool allowEmptyEntries = FALSE )</li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
The TQStringList class provides a list of strings.
<p>
<p> It is used to store and manipulate strings that logically belong
together. Essentially TQStringList is a <a href="qvaluelist.html">TQValueList</a> of <a href="qstring.html">TQString</a>
objects. Unlike <a href="qstrlist.html">TQStrList</a>, which stores pointers to characters,
TQStringList holds real TQString objects. It is the class of choice
whenever you work with Unicode strings. TQStringList is part of the
<a href="qtl.html">TQt Template Library</a>.
<p> Like TQString itself, TQStringList objects are <a href="shclass.html#implicitly-shared">implicitly shared</a>, so
passing them around as value-parameters is both fast and safe.
<p> Strings can be added to a list using <a href="qvaluelist.html#append">append</a>(), <a href="qvaluelist.html#operator+-eq">operator+=</a>() or
<a href="qvaluelist.html#operator-lt-lt">operator<<</a>(), e.g.
<pre>
TQStringList fonts;
fonts.<a href="qvaluelist.html#append">append</a>( "Times" );
fonts += "Courier";
fonts += "Courier New";
fonts << "Helvetica [Cronyx]" << "Helvetica [Adobe]";
</pre>
<p> String lists have an iterator, TQStringList::Iterator(), e.g.
<pre>
for ( TQStringList::<a href="qvaluelist.html#Iterator">Iterator</a> it = fonts.begin(); it != fonts.end(); ++it ) {
cout << *it << ":";
}
cout << endl;
// Output:
// Times:Courier:Courier New:Helvetica [Cronyx]:Helvetica [Adobe]:
</pre>
<p> Many TQt functions return string lists by value; to iterate over
these you should make a copy and iterate over the copy.
<p> You can concatenate all the strings in a string list into a single
string (with an optional separator) using <a href="#join">join</a>(), e.g.
<pre>
<a href="qstring.html">TQString</a> allFonts = fonts.join( ", " );
cout << allFonts << endl;
// Output:
// Times, Courier, Courier New, Helvetica [Cronyx], Helvetica [Adobe]
</pre>
<p> You can sort the list with <a href="#sort">sort</a>(), and extract a new list which
contains only those strings which contain a particular substring
(or match a particular <a href="qregexp.html#regular-expression">regular expression</a>) using the <a href="#grep">grep</a>()
functions, e.g.
<pre>
fonts.sort();
cout << fonts.join( ", " ) << endl;
// Output:
// Courier, Courier New, Helvetica [Adobe], Helvetica [Cronyx], Times
TQStringList helveticas = fonts.grep( "Helvetica" );
cout << helveticas.<a href="#join">join</a>( ", " ) << endl;
// Output:
// Helvetica [Adobe], Helvetica [Cronyx]
</pre>
<p> Existing strings can be split into string lists with character,
string or regular expression separators, e.g.
<pre>
<a href="qstring.html">TQString</a> s = "Red\tGreen\tBlue";
TQStringList colors = TQStringList::<a href="#split">split</a>( "\t", s );
cout << colors.<a href="#join">join</a>( ", " ) << endl;
// Output:
// Red, Green, Blue
</pre>
<p>See also <a href="shared.html">Implicitly and Explicitly Shared Classes</a>, <a href="text.html">Text Related Classes</a>, and <a href="tools.html">Non-GUI Classes</a>.
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="TQStringList"></a>TQStringList::TQStringList ()
</h3>
<p> Creates an empty string list.
<h3 class=fn><a name="TQStringList-2"></a>TQStringList::TQStringList ( const <a href="qstringlist.html">TQStringList</a> & l )
</h3>
<p> Creates a copy of the list <em>l</em>. This function is very fast
because TQStringList is <a href="shclass.html#implicitly-shared">implicitly shared</a>. In most situations this
acts like a <a href="shclass.html#deep-copy">deep copy</a>, for example, if this list or the original
one or some other list referencing the same shared data is
modified, the modifying list first makes a copy, i.e.
copy-on-write.
In a threaded environment you may require a real deep copy
.
<h3 class=fn><a name="TQStringList-3"></a>TQStringList::TQStringList ( const <a href="qvaluelist.html">TQValueList</a><TQString> & l )
</h3>
<p> Constructs a new string list that is a copy of <em>l</em>.
<h3 class=fn><a name="TQStringList-4"></a>TQStringList::TQStringList ( const <a href="qstring.html">TQString</a> & i )
</h3>
<p> Constructs a string list consisting of the single string <em>i</em>.
Longer lists are easily created as follows:
<p> <pre>
TQStringList items;
items << "Buy" << "Sell" << "Update" << "Value";
</pre>
<h3 class=fn><a name="TQStringList-5"></a>TQStringList::TQStringList ( const char * i )
</h3>
<p> Constructs a string list consisting of the single Latin-1 string <em>i</em>.
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="fromStrList"></a>TQStringList::fromStrList ( const <a href="qstrlist.html">TQStrList</a> & ascii )<tt> [static]</tt>
</h3>
Converts from an ASCII-TQStrList <em>ascii</em> to a TQStringList (Unicode).
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="grep"></a>TQStringList::grep ( const <a href="qstring.html">TQString</a> & str, bool cs = TRUE ) const
</h3>
Returns a list of all the strings containing the substring <em>str</em>.
<p> If <em>cs</em> is TRUE, the grep is done case-sensitively; otherwise
case is ignored.
<p> <pre>
TQStringList list;
list << "Bill Gates" << "John Doe" << "Bill Clinton";
list = list.<a href="#grep">grep</a>( "Bill" );
// list == ["Bill Gates", "Bill Clinton"]
</pre>
<p> <p>See also <a href="qstring.html#find">TQString::find</a>().
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="grep-2"></a>TQStringList::grep ( const <a href="qregexp.html">TQRegExp</a> & rx ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns a list of all the strings that match the <a href="qregexp.html#regular-expression">regular expression</a> <em>rx</em>.
<p> <p>See also <a href="qstring.html#find">TQString::find</a>().
<h3 class=fn><a href="qstringlist.html">TQStringList</a> & <a name="gres"></a>TQStringList::gres ( const <a href="qstring.html">TQString</a> & before, const <a href="qstring.html">TQString</a> & after, bool cs = TRUE )
</h3>
Replaces every occurrence of the string <em>before</em> in the strings
that constitute the string list with the string <em>after</em>. Returns
a reference to the string list.
<p> If <em>cs</em> is TRUE, the search is case sensitive; otherwise the
search is case insensitive.
<p> Example:
<pre>
TQStringList list;
list << "alpha" << "beta" << "gamma" << "epsilon";
list.<a href="#gres">gres</a>( "a", "o" );
// list == ["olpho", "beto", "gommo", "epsilon"]
</pre>
<p> <p>See also <a href="qstring.html#replace">TQString::replace</a>().
<h3 class=fn><a href="qstringlist.html">TQStringList</a> & <a name="gres-2"></a>TQStringList::gres ( const <a href="qregexp.html">TQRegExp</a> & rx, const <a href="qstring.html">TQString</a> & after )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Replaces every occurrence of the regexp <em>rx</em> in the string
with <em>after</em>. Returns a reference to the string list.
<p> Example:
<pre>
TQStringList list;
list << "alpha" << "beta" << "gamma" << "epsilon";
list.<a href="#gres">gres</a>( TQRegExp("^a"), "o" );
// list == ["olpha", "beta", "gamma", "epsilon"]
</pre>
<p> For regexps containing <a href="qregexp.html#capturing-text">capturing parentheses</a>, occurrences of <b>\1</b>,
<b>\2</b>, ..., in <em>after</em> are replaced with <em>rx</em>.cap(1),
cap(2), ...
<p> Example:
<pre>
TQStringList list;
list << "Bill Clinton" << "Gates, Bill";
list.<a href="#gres">gres</a>( TQRegExp("^(.*), (.*)$"), "\\2 \\1" );
// list == ["Bill Clinton", "Bill Gates"]
</pre>
<p> <p>See also <a href="qstring.html#replace">TQString::replace</a>().
<h3 class=fn><a href="qstring.html">TQString</a> <a name="join"></a>TQStringList::join ( const <a href="qstring.html">TQString</a> & sep ) const
</h3>
Joins the string list into a single string with each element
separated by the string <em>sep</em> (which can be empty).
<p> <p>See also <a href="#split">split</a>().
<p>Examples: <a href="fileiconview-example.html#x872">fileiconview/qfileiconview.cpp</a> and <a href="toplevel-example.html#x2533">toplevel/options.ui.h</a>.
<h3 class=fn>void <a name="sort"></a>TQStringList::sort ()
</h3>
Sorts the list of strings in ascending case-sensitive order.
<p> Sorting is very fast. It uses the <a href="qtl.html">TQt Template
Library's</a> efficient HeapSort implementation that has a
time complexity of O(n*log n).
<p> If you want to sort your strings in an arbitrary order consider
using a <a href="qmap.html">TQMap</a>. For example you could use a TQMap<TQString,TQString>
to create a case-insensitive ordering (e.g. mapping the lowercase
text to the text), or a TQMap<int,TQString> to sort the strings by
some integer index, etc.
<p>Example: <a href="themes-example.html#x341">themes/themes.cpp</a>.
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="split"></a>TQStringList::split ( const <a href="qregexp.html">TQRegExp</a> & sep, const <a href="qstring.html">TQString</a> & str, bool allowEmptyEntries = FALSE )<tt> [static]</tt>
</h3>
Splits the string <em>str</em> into strings wherever the <a href="qregexp.html#regular-expression">regular expression</a> <em>sep</em> occurs, and returns the list of those strings.
<p> If <em>allowEmptyEntries</em> is TRUE, a null string is inserted in
the list wherever the separator matches twice without intervening
text.
<p> For example, if you split the string "a,,b,c" on commas, <a href="#split">split</a>()
returns the three-item list "a", "b", "c" if <em>allowEmptyEntries</em>
is FALSE (the default), and the four-item list "a", "", "b", "c"
if <em>allowEmptyEntries</em> is TRUE.
<p> If <em>sep</em> does not match anywhere in <em>str</em>, split() returns a
single element list with the element containing the single string
<em>str</em>.
<p> <p>See also <a href="#join">join</a>() and <a href="qstring.html#section">TQString::section</a>().
<p>Examples: <a href="tutorial2-03.html#x2552">chart/element.cpp</a>, <a href="dirview-example.html#x1703">dirview/dirview.cpp</a>, and <a href="httpd-example.html#x733">network/httpd/httpd.cpp</a>.
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="split-2"></a>TQStringList::split ( const <a href="qstring.html">TQString</a> & sep, const <a href="qstring.html">TQString</a> & str, bool allowEmptyEntries = FALSE )<tt> [static]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version of the function uses a <a href="qstring.html">TQString</a> as separator, rather
than a <a href="qregexp.html#regular-expression">regular expression</a>.
<p> If <em>sep</em> is an empty string, the return value is a list of
one-character strings: <a href="#split">split</a>( TQString( "" ), "four" ) returns the
four-item list, "f", "o", "u", "r".
<p> If <em>allowEmptyEntries</em> is TRUE, a null string is inserted in
the list wherever the separator matches twice without intervening
text.
<p> <p>See also <a href="#join">join</a>() and <a href="qstring.html#section">TQString::section</a>().
<h3 class=fn><a href="qstringlist.html">TQStringList</a> <a name="split-3"></a>TQStringList::split ( const <a href="qchar.html">TQChar</a> & sep, const <a href="qstring.html">TQString</a> & str, bool allowEmptyEntries = FALSE )<tt> [static]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version of the function uses a <a href="qchar.html">TQChar</a> as separator, rather
than a <a href="qregexp.html#regular-expression">regular expression</a>.
<p> <p>See also <a href="#join">join</a>() and <a href="qstring.html#section">TQString::section</a>().
<!-- eof -->
<hr><p>
This file is part of the <a href="index.html">TQt toolkit</a>.
Copyright © 1995-2007
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright © 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>TQt 3.3.8</div>
</table></div></address></body>
</html>
|
