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PostgreSQL ERROR: canceling statement due to conflict with recovery
...inks it can clean up (vacuum) old versions of its rows. Then secondary has to replay this cleanup, and has to forcibly cancel all queries which can use these rows.
Longer queries will be canceled more often.
You can work around this by starting a repeatable read transaction on primary which does a...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
I am using java language,I have a method that is supposed to return an object if it is found.
36 Answers
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How do I import other TypeScript files?
... can use simple import statements just like in ES6:
import { ZipCodeValidator } from "./ZipCodeValidator";
let myValidator = new ZipCodeValidator();
https://www.typescriptlang.org/docs/handbook/modules.html
Old answer: From TypeScript version 1.5 you can use tsconfig.json: http://www.typescript...
What is the difference between min SDK version/target SDK version vs. compile SDK version?
...ssue.
The target sdk version is the version your application was targeted to run on. Ideally, this is because of some sort of optimal run conditions. If you were to "make your app for version 19", this is where that would be specified. It may run on earlier or later releases, but this is what you w...
Testing HTML email rendering [closed]
Are there any good tools to easily test how HTML email will look across different email clients? I prefer something with instant feed back rather than a submit and wait service like http://litmusapp.com Or at the very least a way to test the Outlook 2007/MS Word rendering?
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What is stack unwinding?
...d for pleak will be lost if an exception is thrown, while memory allocated to s will be properly released by std::string destructor in any case. The objects allocated on the stack are "unwound" when the scope is exited (here the scope is of the function func.) This is done by the compiler inserting ...
How to order citations by appearance using BibTeX?
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There are three good answers to this question.
Use the unsrt bibliography style, if you're happy with its formatting otherwise
Use the makebst (link) tool to design your own bibliography style
And my personal recommendation:
Use the biblatex packag...
GitHub relative link in Markdown file
Is there a way to create a URL anchor, <a> , link from within a Markdown file, to another file within the same repository and branch (aka a link relative to the current branch)?
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Dealing with “Xerces hell” in Java/Maven?
In my office, the mere mention of the word Xerces is enough to incite murderous rage from developers. A cursory glance at the other Xerces questions on SO seem to indicate that almost all Maven users are "touched" by this problem at some point. Unfortunately, understanding the problem requires a bi...
convert String to DateTime
I need to parse following String into a DateTime Object:
30/Nov/2009:16:29:30 +0100
8 Answers
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