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How to prevent gcc optimizing some statements in C?
... but it is unnecessary. A safer alternative is to make it illegal for the compiler to optimize out the store by using the volatile type qualifier.
// Assuming pageptr is unsigned char * already...
unsigned char *pageptr = ...;
((unsigned char volatile *)pageptr)[0] = pageptr[0];
The volatile typ...
How to collapse all methods in Xcode?
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As of Xcode 4 it seems to have changed.
command-alt-shift-left arrow will do the trick...
To fold/unfold current methods or if structures use:
Fold: command-alt-left arrow
Unfold: command-alt-right arrow
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Running multiple commands in one line in shell
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You are using | (pipe) to direct the output of a command into another command. What you are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used && cp /templates/apple /templates/inus...
What does -D_XOPEN_SOURCE do/mean?
I recently encountered some code that gcc would not compile without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does.
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How to include a child object's child object in Entity Framework 5
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Which version did the lamba method come available? I'm stuck on a EF 4.0 Codebase..and cant' get the lamdas to work. Thanks for any input.
– granadaCoder
Sep 2 '14 at 19:39
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Gradient of n colors ranging from color 1 and color 2
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Difference between margin and padding?
...s for a definition. But the graphic is a perfect illustration. w3schools.com/css/css_margin.asp w3schools.com/css/css_padding.asp
– Suroot
May 11 '11 at 2:53
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Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...s vulnerable to padding oracle attacks.
See also:
https://stackoverflow.com/a/30189841/2224584
https://stackoverflow.com/a/30166085/2224584
https://stackoverflow.com/a/30159120/2224584
Also, don't just use a "password" for an encryption key. Encryption keys are random strings.
Demo at 3v4l.o...
How to get anchor text/href on click using jQuery?
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@rahul: it is becoming funny again, he could give his links any unique name.
– Sarfraz
Apr 16 '10 at 11:15
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Rails: how do I validate that something is a boolean?
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