206 lines
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206 lines
11 KiB
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<div class="PageDoc"><div class="header">
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<div class="title">string </div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><dl class="section note"><dt>Note</dt><dd>Strings are only available in the scripts if the application <a class="el" href="doc_addon_std_string.html">registers the support for them</a>. The syntax for using strings may differ for the application you're working with so consult the application's manual for more details.</dd></dl>
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<dl class="section see"><dt>See also</dt><dd><a class="el" href="doc_datatypes_strings.html">Strings</a> for information on syntax for string literals</dd></dl>
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<h1><a class="anchor" id="doc_datatypes_strings_addon"></a>
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Supporting string object and functions</h1>
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<p>The string object supports a number of operators, and has several class methods and supporting global functions to facilitate the manipulation of strings.</p>
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<h2><a class="anchor" id="doc_datatypes_strings_addon_ops"></a>
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Operators</h2>
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<p><b>= assignment</b><br />
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</p>
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<p>The assignment operator copies the content of the right hand string into the left hand string.</p>
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<p>Assignment of primitive types is allowed, which will do a default transformation of the primitive to a string.</p>
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<p><b>+, += concatenation</b><br />
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</p>
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<p>The concatenation operator appends the content of the right hand string to the end of the left hand string.</p>
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<p>Concatenation of primitives types is allowed, which will do a default transformation of the primitive to a string.</p>
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<p><b>==, != equality</b><br />
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</p>
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<p>Compares the content of the two strings.</p>
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<p><b><, >, <=, >= comparison</b><br />
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</p>
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<p>Compares the content of the two strings. The comparison is done on the byte values in the strings, which may not correspond to alphabetical comparisons for some languages.</p>
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<p><b>[] index operator</b><br />
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</p>
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<p>The index operator gives access to a single byte in the string.</p>
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<h2><a class="anchor" id="doc_datatypes_strings_addon_mthd"></a>
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Methods</h2>
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<p><b>uint length() const</b><br />
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</p>
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<p>Returns the length of the string.</p>
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<p><b>void resize(uint)</b><br />
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</p>
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<p>Sets the length of the string.</p>
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<p><b>bool isEmpty() const</b><br />
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</p>
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<p>Returns true if the string is empty, i.e. the length is zero.</p>
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<p><b>string substr(uint start = 0, int count = -1) const</b><br />
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</p>
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<p>Returns a string with the content starting at <em>start</em> and the number of bytes given by count. The default arguments will return the whole string as the new string.</p>
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<p><b>void insert(uint pos, const string &in other)</b><br />
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</p>
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<p>Inserts another string <em>other</em> at position <em>pos</em> in the original string.</p>
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<p><b>void erase(uint pos, int count = -1)</b><br />
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</p>
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<p>Erases a range of characters from the string, starting at position <em>pos</em> and counting <em>count</em> characters.</p>
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<p><b>int findFirst(const string &in str, uint start = 0) const</b><br />
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</p>
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<p>Find the first occurrence of the value <em>str</em> in the string, starting at <em>start</em>. If no occurrence is found a negative value will be returned.</p>
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<p><b>int findLast(const string &in str, int start = -1) const</b><br />
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</p>
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<p>Find the last occurrence of the value <em>str</em> in the string. If <em>start</em> is informed the search will begin at that position, i.e. any potential occurrence after that position will not be searched. If no occurrence is found a negative value will be returned.</p>
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<p><b>int findFirstOf(const string &in chars, int start = 0) const</b><br />
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<b>int findFirstNotOf(const string &in chars, int start = 0) const</b><br />
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<b>int findLastOf(const string &in chars, int start = -1) const</b><br />
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<b>int findLastNotOf(const string &in chars, int start = -1) const</b><br />
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</p>
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<p>The first variant finds the first character in the string that matches on of the characters in <em>chars</em>, starting at <em>start</em>. If no occurrence is found a negative value will be returned.</p>
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<p>The second variant finds the first character that doesn't match any of those in <em>chars</em>. The third and last variant are the same except they start the search from the end of the string.</p>
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<dl class="section note"><dt>Note</dt><dd>These functions work on the individual bytes in the strings. They do not attempt to understand encoded characters, e.g. UTF-8 encoded characters that can take up to 4 bytes.</dd></dl>
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<p><b>array<string>@ split(const string &in delimiter) const</b><br />
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</p>
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<p>Splits the string in smaller strings where the delimiter is found.</p>
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<h2><a class="anchor" id="doc_datatypes_strings_addon_funcs"></a>
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Functions</h2>
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<p><b>string join(const array<string> &in arr, const string &in delimiter)</b><br />
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</p>
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<p>Concatenates the strings in the array into a large string, separated by the delimiter.</p>
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<p><b>int64 parseInt(const string &in str, uint base = 10, uint &out byteCount = 0)</b><br />
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<b>uint64 parseUInt(const string &in str, uint base = 10, uint &out byteCount = 0)</b><br />
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</p>
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<p>Parses the string for an integer value. The <em>base</em> can be 10 or 16 to support decimal numbers or hexadecimal numbers. If <em>byteCount</em> is provided it will be set to the number of bytes that were considered as part of the integer value.</p>
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<p><b>double parseFloat(const string &in, uint &out byteCount = 0)</b><br />
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</p>
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<p>Parses the string for a floating point value. If <em>byteCount</em> is provided it will be set to the number of bytes that were considered as part of the value.</p>
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<p><b>string formatInt(int64 val, const string &in options = '', uint width = 0)</b><br />
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<b>string formatUInt(uint64 val, const string &in options = '', uint width = 0)</b><br />
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<b>string formatFloat(double val, const string &in options = '', uint width = 0, uint precision = 0)</b><br />
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</p>
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<p>The format functions takes a string that defines how the number should be formatted. The string is a combination of the following characters:</p>
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<ul>
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<li>l = left justify</li>
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<li>0 = pad with zeroes</li>
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<li>+ = always include the sign, even if positive</li>
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<li>space = add a space in case of positive number</li>
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<li>h = hexadecimal integer small letters (not valid for formatFloat)</li>
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<li>H = hexadecimal integer capital letters (not valid for formatFloat)</li>
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<li>e = exponent character with small e (only valid for formatFloat)</li>
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<li>E = exponent character with capital E (only valid for formatFloat)</li>
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</ul>
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<p>Examples:</p>
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<pre>
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// Left justify number in string with 10 characters
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string justified = formatInt(number, 'l', 10);</pre><pre> // Create hexadecimal representation with capital letters, right justified
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string hex = formatInt(number, 'H', 10);</pre><pre> // Right justified, padded with zeroes and two digits after decimal separator
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string num = formatFloat(number, '0', 8, 2);
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</pre> </div></div><!-- contents -->
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<li class="footer">Generated on Sat Dec 5 2020 23:20:25 for AngelScript by
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.18 </li>
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