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How to define object in array in Mongoose schema correctly with 2d geo index
... } //inserted data is the object to be inserted
}
});
or you can set the Array of object by
db.update ({'seraching criteria goes here ' },
{
$set : {
trk : [ {
"lat": 50.3293714,
"lng": 6.9389939
},
...
What are the use cases for selecting CHAR over VARCHAR in SQL?
...tion to the actual data. So (assuming you are using a one-byte character set) storing the word "FooBar"
CHAR(6) = 6 bytes (no overhead)
VARCHAR(100) = 8 bytes (2 bytes of overhead)
CHAR(10) = 10 bytes (4 bytes of waste)
The bottom line is CHAR can be faster and more space-efficient for data of r...
Non-static variable cannot be referenced from a static context
...usually constants (like car types, i.e. something where you have a limited set which doesn't change often).
To solve your problem, you need to instantiate an instance (create an object) of your class so the runtime can reserve memory for the instance (otherwise, different instances would overwrite ...
Running Bash commands in Python
... of code ... which conveniently already exist in the standard library as a set of higher-level wrapper functions for various purposes, which are presented in more detail in the following.
Here's a paragraph from the documentation:
The recommended approach to invoking subprocesses is to use the ...
Why use Gradle instead of Ant or Maven? [closed]
...ild configurations, and the inheritance model means you can define a small set of parent POMs encapsulating your build configurations for the whole enterprise and individual projects can inherit those configurations, leaving them lightweight. Maven configuration is very verbose (though Maven 3 promi...
What is the method for converting radians to degrees?
I run into this occasionally and always forget how to do it.
12 Answers
12
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How do I find files with a path length greater than 260 characters in Windows?
...Along with it, only a shortened path is printed. eg: D:\Dropbox\ProY...sh._setbinddata. Those are exactly the paths i want to find, but I cant see the whole path! Any way around this?
– MiniGod
Jan 13 '15 at 0:32
...
How to select date without time in SQL
When I select date in SQL it is returned as 2011-02-25 21:17:33.933 . But I need only the Date part, that is 2011-02-25 . How can I do this?
...
Extracting specific columns in numpy array
This is an easy question but say I have an MxN matrix. All I want to do is extract specific columns and store them in another numpy array but I get invalid syntax errors.
Here is the code:
...