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org.xml.sax.SAXParseException: Content is not allowed in prolog
... the prolog designates this bracket-question mark delimited element at the start of the document (while the tag prolog in stackoverflow refers to the programming language).
Added: Is that dash in front of your prolog part of the document? That would be the error there, having data in front of the ...
What would cause an algorithm to have O(log n) complexity?
... work from the right to the left. For example, to add 1337 and 2065, we'd start by writing the numbers out as
1 3 3 7
+ 2 0 6 5
==============
We add the last digit and carry the 1:
1
1 3 3 7
+ 2 0 6 5
==============
2
Then we add the second-to-l...
How to set environment variable or system property in spring tests?
...
The right way to do this, starting with Spring 4.1, is to use a @TestPropertySource annotation.
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:whereever/context.xml")
@TestPropertySource(properties = {"myproperty...
What is the --save option for npm install?
...ginal answer:
It won't do anything if you don't have a package.json file. Start by running npm init to create one. Then calls to npm install --save or npm install --save-dev or npm install --save-optional will update the package.json to list your dependencies.
...
Concatenating two std::vectors
...o some optimization to avoid reallocations. it could reserve memory before starting copying
– Yogesh Arora
Mar 22 '10 at 13:16
8
...
Comparing HTTP and FTP for transferring files
...the TCP state but HTTP does not. There are 6 packet transfers before data starts transferring in FTP but only 4 in HTTP.
I think a properly tuned TCP layer would have more effect on speed than the difference between application layer protocols. The Sun Blueprint Understanding Tuning TCP has detail...
Does a view exist in ASP.NET MVC?
... needed to check if my view is partial or not and as all my partials' name starts with underline now I can work with my solution checking if "result.View != null"
– Deise Vicentin
Nov 16 '16 at 13:44
...
How to commit my current changes to a different branch in Git [duplicate]
... save some work. As usual, there are a lot of ways to do this. Here's one, starting from after you pop and see the conflicts:
# Unstage everything (warning: this leaves files with conflicts in your tree)
git reset
# Add the things you *do* want to commit here
git add -p # or maybe git add -i
g...
Check if something is (not) in a list in Python
...].__contains__(1)
# True
in short-circuits, so if your element is at the start of the list, in evaluates faster:
lst = list(range(10001))
%timeit 1 in lst
%timeit 10000 in lst # Expected to take longer time.
68.9 ns ± 0.613 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
178 µs...
Reading a List from properties file and load with spring annotation @Value
...3@example.com,.....
With Spring Boot, you can write it like these (Index start at 0):
email.sendTo[0]=somebody@example.com
email.sendTo[1]=somebody2@example.com
email.sendTo[2]=somebody3@example.com
And use it like these:
@Component
@ConfigurationProperties("email")
public class EmailPropertie...