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Run a Docker image as a container
After building a Docker image from a dockerfile , I see the image was built successfully, but what do I do with it? Shouldn't i be able to run it as a container?
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Convert a String In C++ To Upper Case
...ing glibc's toupper in a loop.) There's a dynamic_cast of the locale that doesn't get hoisted out of the per-char loop. See my answer. On the plus side, this may be properly UTF-8 aware, but the slowdown doesn't come from handling UTF-8; it comes from using a dynamic_cast to re-check the locale e...
What do the crossed style properties in Google Chrome devtools mean?
...SS properties. At times, some of these properties are struck-through. What do these properties mean?
5 Answers
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Compiling problems: cannot find crt1.o
...t. You need the 32bit support files. For that, you need to install them
sudo apt install gcc-multilib
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Way to go from recursion to iteration
...ack.length) {
// Pop off end of stack.
obj = stack.pop();
// Do stuff.
// Push other objects on the stack as needed.
...
}
Note: if you have more than one recursive call inside and you want to preserve the order of the calls, you have to add them in the reverse order to the s...
Is it good practice to NULL a pointer after deleting it?
...ndard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
Whereas:
Foo* foo = new Foo();
delete foo; // Deletes the object
delete foo; // Undefined behavio...
How do I delete an exported environment variable?
...This should work per terminal instance. Generally, each time a terminal window is opened, it will load up variables from various places such as ~/.bashrc, ~/.profile, etc. Any variables you set in one terminal instance will not carry over to another. If you have a variable which seems to be set auto...
When to use an interface instead of an abstract class and vice versa?
This may be a generic OOP question. I wanted to do a generic comparison between an interface and an abstract class on the basis of their usage.
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Intercept page exit event
...ithin my system, a user might decide to navigate to another website and in doing so could lose all the edits they have not saved.
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Showing which files have changed between two revisions
...tbranch..yourBranchName
There is more options to git diff in the official documentation.
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