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What are the differences between a pointer variable and a reference variable in C++?

...e of that object becomes the lifetime of the reference. std::string s1 = "123"; std::string s2 = "456"; std::string s3_copy = s1 + s2; const std::string& s3_reference = s1 + s2; In this example s3_copy copies the temporary object that is a result of the concatenation. Whereas s3_reference in...
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What is the difference between const and readonly in C#?

... GishuGishu 123k4545 gold badges214214 silver badges294294 bronze badges ...
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What is 'Context' on Android?

... 123 A Context is a handle to the system; it provides services like resolving resources, obtaining ...
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Where does Android emulator store SQLite database?

... 123 An update mentioned in the comments below: You don't need to be on the DDMS perspective an...
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Select by partial string from a pandas DataFrame

... df[df['value'].astype(str).str.contains('1234.+')] for filtering out non-string-type columns. – François Leblanc Feb 13 '18 at 20:22 ...
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Is there a better way to run a command N times in bash?

... 123 Another simple way to hack it: seq 20 | xargs -Iz echo "Hi there" run echo 20 times. Not...
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Choosing Mobile Web HTML5 Framework [closed]

... 123 +100 It dep...
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How to detect if URL has changed after hash in JavaScript

...way to circumvent this by monkey-patching the functions according to @alpha123: var pushState = history.pushState; history.pushState = function () { pushState.apply(history, arguments); fireEvents('pushState', arguments); // Some event-handling function }; Original answer Given that the...
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How to set a cookie for another domain

...an image on domain A. <img src="http://www.example.com/cookie.php?val=123" style="display:none;"> And then on domain B that is example.com in cookie.php you'll have the following code: <?php setcookie('a', $_GET['val']); ?> Hattip to Subin ...
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PHP Array to CSV

...$f); } $list = array ( array('aaa', 'bbb', 'ccc', 'dddd'), array('123', '456', '789'), array('"aaa"', '"bbb"') ); var_dump(array2csv($list)); share | improve this answer | ...