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How do I delete an exported environment variable?
Before installing gnuplot, I set the environment variable GNUPLOT_DRIVER_DIR = /home/gnuplot/build/src . During the installation, something went wrong.
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Returning an array using C
...ype; the function actually receives a pointer type:
void foo(char *a, size_t asize)
{
// do something with a
}
int bar(void)
{
char str[6] = "Hello";
foo(str, sizeof str);
}
In the call to foo, the expression str is converted from type char [6] to char *, which is why the first parameter o...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...mount greater than or equal to the number of bits in the number (e.g. int64_t i = 1; i <<= 72 is undefined)
Types, Cast and Const
Casting a numeric value into a value that can't be represented by the target type (either directly or via static_cast)
Using an automatic variable before it has b...
What is an MvcHtmlString and when should I use it?
...d my own extension method to make a <link> tag:
<Extension()> _
Public Function CssBlock(ByVal html As HtmlHelper, ByVal src As String, ByVal Optional ByVal htmlAttributes As Object = Nothing) As MvcHtmlString
Dim tag = New TagBuilder("link")
tag.MergeAttribute("type", "text/css...
REST API Best practices: Where to put parameters? [closed]
... a limit to the length of a GET request? and Max size of URL parameters in _GET
p.s. these limits are based on the client capabilities (browser) and server(configuration).
share
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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...".
Without the mutable keyword you will eventually be forced to use const_cast to handle the various useful special cases it allows (caching, ref counting, debug data, etc.). Unfortunately const_cast is significantly more destructive than mutable because it forces the API client to destroy the con...
Difference between Destroy and Delete
...ary key, and no callbacks are executed.
To enforce the object's before_destroy and after_destroy callbacks or any :dependent association options, use #destroy.
ActiveRecord::Persistence.destroy
Deletes the record in the database and freezes this instance to reflect that no changes should b...
“open/close” SqlConnection or keep open?
...ion()) {} public SqlConnection GetConnection() { return new SqlConnection(_connectionString); }
– ganders
Jan 23 at 17:12
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How to change package name of an Android Application
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And you might need to change app_name in res->values=>strings.xml
– Deqing
Sep 24 '13 at 9:26
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C# Events and Thread Safety
...memory model aspect of the question; see code.logos.com/blog/2008/11/events_and_threads_part_4.html
– Bradley Grainger
Apr 29 '09 at 20:58
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