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nil detection in Go
... considers it as an invalid comparison and yells at you.
What you want to do here is to compare a pointer to your config instance to nil, which is a valid comparison. To do that you can either use the golang new builtin, or initialize a pointer to it:
config := new(Config) // not nil
or
config...
Executing multiple commands from a Windows cmd script
I'm trying to write a Windows cmd script to perform several tasks in series.
However, it always stops after the first command in the script.
...
std::string to char*
...g";
char *cstr = new char[str.length() + 1];
strcpy(cstr, str.c_str());
// do stuff
delete [] cstr;
Or in modern C++:
std::vector<char> cstr(str.c_str(), str.c_str() + str.size() + 1);
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How to diff one file to an arbitrary version in Git?
...
You can do:
git diff master~20:pom.xml pom.xml
... to compare your current pom.xml to the one from master 20 revisions ago through the first parent. You can replace master~20, of course, with the object name (SHA1sum) of a commit...
How to define an enum with string value?
...one:
public string ToSeparatorString(this Separator separator)
{
// TODO: validation
return ((char) separator).ToString();
}
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Why does integer overflow on x86 with GCC cause an infinite loop?
... answered Oct 7 '11 at 2:36
bdonlanbdonlan
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Algorithm to compare two images
...hance if one being the illegal copy of another. The author of the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image).
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How do you get the width and height of a multi-dimensional array?
... discardSelector: ".discard-answer"
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});
}
});
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Why does this iterative list-growing code give IndexError: list assignment index out of range?
...ut you're attempting to write to element [0] in the first iteration, which doesn't exist yet.
Try the following instead, to add a new element to the end of the list:
for l in i:
j.append(l)
Of course, you'd never do this in practice if all you wanted to do was to copy an existing list. You'd...
ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'db'
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What if I am using windows?
– PHPFan
May 17 '17 at 7:39
exit or q...