Empty string: Difference between revisions
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Childishbeat (talk | contribs) m (Zoomscript example added.) |
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// ... |
// ... |
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std::string str; // a string object for an empty string |
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// empty string declaration |
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std::string str; // (default constructed) |
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std::string str(); // (default constructor, no parameters) |
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std::string str{}; // (default initialized) |
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std::string str(""); // (const char[] conversion) |
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std::string str{""}; // (const char[] initializer list) |
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if (str.empty()) { ... } // to test if string is empty |
if (str.empty()) { ... } // to test if string is empty |
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if (str.length() == 0) { ... } |
if (str.length() == 0) { ... } |
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if (str == "") { ... }</lang> |
if (str == "") { ... }</lang> |
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// make a std::string empty |
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str.clear(); // (builtin clear function) |
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str = ""; // replace contents with empty string |
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str = {}; // swap contents with temp string (empty),then destruct temp |
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std::swap(str, {}); // swap contents with empty string (empty initializer list) |
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// create an array of empty strings |
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std::string s_array[100]; // 100 initialized to "" (fixed size) |
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std::array<std::string, 100> arr; // 100 initialized to "" (fixed size) |
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std::vector<std::string>(100,""); // 100 initialized to "" (variable size, 100 starting size) |
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// create empty string as default parameter |
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void func( std::string& s = {} ); // {} generated default std:string instance |
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=={{header|C sharp}}== |
=={{header|C sharp}}== |
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