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Delete a key from a MongoDB document using Mongoose
..._id: user._id}, {$unset: {field: 1 }}, callback);
And since version 2.4, if you have an instance of a model already you can do:
doc.field = undefined;
doc.save(callback);
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Installing specific laravel version with composer create-project
...command creates a new project from a given
package into a new directory. If executed without params and in a
directory with a composer.json file it installs the
packages for the current project.
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Initialize a nested struct
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Well, any specific reason to not make Proxy its own struct?
Anyway you have 2 options:
The proper way, simply move proxy to its own struct, for example:
type Configuration struct {
Val string
Proxy Proxy
}
type Proxy struct {
...
Converting List to List
...m sure you know how to do this):
List<Integer> oldList = ...
/* Specify the size of the list up front to prevent resizing. */
List<String> newList = new ArrayList<>(oldList.size());
for (Integer myInt : oldList) {
newList.add(String.valueOf(myInt));
}
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C++ convert hex string to signed integer
...dard, there are a few new utility functions which you can make use of! specifically, there is a family of "string to number" functions (http://en.cppreference.com/w/cpp/string/basic_string/stol and http://en.cppreference.com/w/cpp/string/basic_string/stoul). These are essentially thin wrappers aroun...
Passing command line arguments in Visual Studio 2010?
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@Andrew Cooper and what if we have 2 argument ? do we need to seprate then with ; , and we set the path in the normal way like we did in c++ ?
– Rocket
Sep 7 '13 at 15:58
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Counting the Number of keywords in a dictionary in python
...
len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file, you could just use set and do like
len(set(open(yourdictfile).read().split()))
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Is there a way of having git show lines added, lines changed and lines removed?
"git diff --stat" and "git log --stat" show output like:
5 Answers
5
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Extracting Nupkg files using command line
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You can also use the NuGet command line, by specifying a local host as part of an install. For example if your package is stored in the current directory
nuget install MyPackage -Source %cd% -OutputDirectory packages
will unpack it into the target directory.
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How do I change the value of a global variable inside of a function
... reference the variable inside the function; no magic, just use it's name. If it's been created globally, then you'll be updating the global variable.
You can override this behaviour by declaring it locally using var, but if you don't use var, then a variable name used in a function will be global ...