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Mongoose, Select a specific field with find
...The precise way to do this is it to use .project() cursor method with the new mongodb and nodejs driver.
var query = await dbSchemas.SomeValue.find({}).project({ name: 1, _id: 0 })
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Can I multiply strings in Java to repeat sequences? [duplicate]
...asiest way in plain Java with no dependencies is the following one-liner:
new String(new char[generation]).replace("\0", "-")
Replace generation with number of repetitions, and the "-" with the string (or char) you want repeated.
All this does is create an empty string containing n number of 0x0...
Disabling Minimize & Maximize On WinForm?
...te.Minimized.
If you want to ever actually close the form, make a class-wide boolean _close and, in your handler, set e.Cancel to !_close, so that whenever the user clicks the X on the window, it doesn't close, but you can still close it (without just killing it) with close = true; this.Close();
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Printing 1 to 1000 without loop or conditionals
...';
}
};
int main()
{
f1<1000>();
f2(1000);
delete[] new A[1000]; // (3)
A data[1000]; // (4) added by Martin York
}
[ Edit: (1) and (4) can be used for compile time constants only, (2) and (3) can be used for runtime expressions too — end edit. ]
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How to call Android contacts list?
...perform a PICK action from the items in the Contacts URI.
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
Call startActivityForResult, passing in this Intent (and a request code integer, PICK_CONTACT in this example). This will cause Android to launch an Act...
How to replace captured groups only?
...eceding and following text:
str.replace(/(.*name="\w+)(\d+)(\w+".*)/, "$1!NEW_ID!$3")
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Finding the max value of an attribute in an array of objects
...
Here is the fiddle! hope this will help to someone jsfiddle.net/45c5r246
– mili
May 20 '15 at 11:27
25
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how to get the one entry from hashmap without iterating
...u asked for other data structures).
TreeMap<String, String> myMap = new TreeMap<String, String>();
String first = myMap.firstEntry().getValue();
String firstOther = myMap.get(myMap.firstKey());
TreeMap has an overhead so HashMap is faster, but just as an example of an alternative solu...
If threads share the same PID, how can they be identified?
... PID of the thread that started the whole process.
Simplistically, when a new process is created, it appears as a thread where both the PID and TGID are the same (new) number.
When a thread starts another thread, that started thread gets its own PID (so the scheduler can schedule it independently)...
How to print out all the elements of a List in Java?
...ublic static void main(String[] args) {
List<Model> models = new ArrayList<>();
// TODO: First create your model and add to models ArrayList, to prevent NullPointerException for trying this example
// Print the name from the list....
for(Model model : mo...