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How do I update/upsert a document in Mongoose?
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Mongoose now supports this natively with findOneAndUpdate (calls MongoDB findAndModify).
The upsert = true option creates the object if it doesn't exist. defaults to false.
var query = {'username': req.user.username};
req.newData.username = req.user.username;
MyMode...
What are the differences between vector and list data types in R?
...ically lists are vectors, although very few would use that term. "list" is one of several modes, with others being "logical", "character", "numeric", "integer". What you are calling vectors are "atomic vectors" in strict R parlance:
aaa <- vector("list", 3)
is.list(aaa) #TRUE
is.vector(aaa)...
Pairs from single list
...e:
from itertools import izip_longest
def blockwise(t, size=2, fillvalue=None):
it = iter(t)
return izip_longest(*[it]*size, fillvalue=fillvalue)
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JavaScript check if variable exists (is defined/initialized)
...check if a variable it's been declared. @BrianKelley's answer is the right one.
– dRamentol
Nov 15 '18 at 19:12
why no...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
... and classes when it comes to object-oriented design and analysis. This is one of them; unfortunately, my OOP professor in college never actually gave an answer to it, and so I've been wondering.
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Formatting numbers (decimal places, thousands separators, etc) with CSS
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Well, for any numbers in Javascript I use next one:
var a = "1222333444555666777888999";
a = a.replace(new RegExp("^(\\d{" + (a.length%3?a.length%3:0) + "})(\\d{3})", "g"), "$1 $2").replace(/(\d{3})+?/gi, "$1 ").trim();
and if you need to use any other separator as com...
Mocking Extension Methods with Moq
...so a link to the documentation: Extension Methods Mocking
Disclaimer. I am one of the developers responsible for JustMock.
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How do I put double quotes in a string in vba?
..., it takes all the confusion of 'how many single and double quotes' out to one definition where it can be documented
– rolinger
Jun 2 '16 at 8:05
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What is a fat JAR? [duplicate]
...erent build systems fat jar is created differently, for example, in Gradle one would create it with (instruction):
task fatJar(type: Jar) {
manifest {
attributes 'Main-Class': 'com.example.Main'
}
baseName = project.name + '-all'
from { configurations.compile.collect { it.is...
How to subtract X day from a Date object in Java?
...= new Date();
LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Java 7 and earlier
Use Calendar's add() method
Calendar cal = Calendar.getInstance();
cal.setTime(dateInstance);
cal.add(Calend...