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Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...e data to read. If all-blank streams are also acceptable, then the correct form is:
while( !(in>>ws).eof() )
{
int data;
in >> data;
if ( in.fail() ) /* handle with break or throw */;
/* this will never fire if the eof is reached cleanly */
// now use data
}
Summar...
What are detached, persistent and transient objects in hibernate?
...original docs provided by frameworks.. which sometime itself have hidden information with proper description just need to explore. only prob is we don't find it easily :)
– agpt
Aug 9 '14 at 13:16
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How do I associate file types with an iPhone application?
...ing documents. The LSItemContentTypes key lets you provide an array of Uniform Type Identifiers (UTIs) that your application can open. For a list of system-defined UTIs, see Apple's Uniform Type Identifiers Reference. Even more detail on UTIs can be found in Apple's Uniform Type Identifiers Overv...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
... See ruby catch-throw and efficiency to understand more about the performance difference.
– Franklin Yu
May 21 '19 at 14:37
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Git: what is a dangling commit/blob and where do they come from?
... blobs, and even some things that git does for you to help avoid loss of information.
Eventually (conditionally, according to the git gc man page) it will perform garbage collection and clean these things up. You can also force it by invoking the garbage collection process, git gc.
For more infor...
Performance surprise with “as” and nullable types
...IT compiler generates a call to a helper function, JIT_Unbox() that can perform a cast to an arbitrary value type. I don't have a great explanation why it is as slow as the cast to Nullable<int>, given that less work ought to be necessary. I suspect that ngen.exe might cause trouble here.
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Git Commit Messages: 50/72 Formatting
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Regarding the “summary” line (the 50 in your formula), the Linux kernel documentation has this to say:
For these reasons, the "summary" must be no more than 70-75
characters, and it must describe both what the patch changes, as well
as why the patch might be necessary....
What Content-Type value should I send for my XML sitemap?
...s" of application/xml registration in Section 3.2).
For text/xml:
Conformant with [RFC2046], if a text/xml entity is received with
the charset parameter omitted, MIME processors and XML processors
MUST use the default charset value of "us-ascii"[ASCII]. In cases
where the XML MIME entit...
node.js child process - difference between spawn & fork
...tion suits the need for many processes/core. You can actually decrease performance by spawning too many workers for your machine/scenario.
Ultimately you could use spawn in a way that did the above, by sending spawn a Node command. But this would be silly, because fork does some things to optimiz...
Check if at least two out of three booleans are true
...
I prefer the purely binary form: return ((a^b) & c) | (a & b). It is branch-less (faster) and easy to read : (a or b is true and c is true) or (a and b are both true). Note that (a|b) and (a^b) both work with this formula.
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