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Find MongoDB records where array field is not empty
...nexpected results. For example: db.doc.find({'nums': { $gt: [] }}).hint({ _id: 1 }).count() returns the right number, while db.doc.find({'nums': { $gt: [] }}).hint({ nums: 1 }).count() returns 0.
– wojcikstefan
Mar 4 '17 at 17:51
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Performance of static methods vs instance methods
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f12279438%2fperformance-of-static-methods-vs-instance-methods%23new-answer', 'question_page');
}
);
...
RESTfully design /login or /register resources?
...ing URLs, and you can make sessions and users resources:
GET /session/new gets the webpage that has the login form
POST /session authenticates credentials against database
DELETE /session destroys session and redirect to /
GET /users/new gets the webpage that has the registration for...
How do I obtain a Query Execution Plan in SQL Server?
...g this on their precious database!
Open SQL Server Profiler and create a new trace connecting to the desired database against which you wish to record the trace.
Under the "Events Selection" tab check "Show all events", check the "Performance" -> "Showplan XML" row and run the trace.
While the ...
How can I read SMS messages from the device programmatically in Android?
...aultSmsPackage(this).equals(myPackageName)) {
Intent intent = new Intent(Telephony.Sms.Intents.ACTION_CHANGE_DEFAULT);
intent.putExtra(Telephony.Sms.Intents.EXTRA_PACKAGE_NAME, myPackageName);
startActivityForResult(intent, 1);
}else {
List<...
Change Git repository directory location.
...hidden .git directory). This will move the entire working directory to the new directory and will not affect the remote repository on GitHub.
If you are using GitHub for Windows, you may move the repository using the method as above. However, when you click on the repository in the application it w...
How to get the list of properties of a class?
... public int A {get;set;}
public string B {get;set;}
}
...
Foo foo = new Foo {A = 1, B = "abc"};
foreach(var prop in foo.GetType().GetProperties()) {
Console.WriteLine("{0}={1}", prop.Name, prop.GetValue(foo, null));
}
Following feedback...
To get the value of static properties, pass...
How to count the number of files in a directory using Python
...
– Kyle Bridenstine
Oct 2 '19 at 13:51
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Maven Modules + Building a Single Specific Module
...y B.
Note that you need to use a colon if you are referencing an artifactId which differs from the directory name:
mvn install -pl :B -am
As described here: https://stackoverflow.com/a/26439938/480894
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Git add and commit in one command
...iles.
git add .
git commit -m "message"
is an easy way to add all files new or modified. Also, the catch-all qualification applies. The above commands will not delete files deleted without the git rm command.
git add app
git commit -m "message"
is an easy way to add all files to the index from...