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Is HTML5 localStorage asynchronous?
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Nope, all localStorage calls are synchronous.
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Maven: Command to update repository after adding dependency to POM
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mvn install (or mvn package) will always work.
You can use mvn compile to download compile time dependencies or mvn test for compile time and test dependencies but I prefer something that always works.
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HTTP Content-Type Header and JSON
...n't care what it is. The browser just returns you the data from the AJAX call. If you want to parse it as JSON, you need to do that on your own.
The header is there so your app can detect what data was returned and how it should handle it. You need to look at the header, and if it's application/...
How to find all tables that have foreign keys that reference particular table.column and have values
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This solution will not only display all relations but also the constraint name, which is required in some cases (e.g. drop constraint):
SELECT
CONCAT(table_name, '.', column_name) AS 'foreign key',
CONCAT(referenced_table_name, '.', referenced_column_n...
Is there a timeout for idle PostgreSQL connections?
...th <idle> in transaction sessions, but with too many connections overall.
Killing connections is not the right answer for that, but it's an OK-ish temporary workaround.
Rather than re-starting PostgreSQL to boot all other connections off a PostgreSQL database, see: How do I detach all other ...
Can I set null as the default value for a @Value in Spring?
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This is really old, but you can use Spring EL now, e.g.
@Value("${stuff.value:#{null}}")
See this question.
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Removing multiple files from a Git repo that have already been deleted from disk
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For Git 1.x
$ git add -u
This tells git to automatically stage tracked files -- including deleting the previously tracked files.
For Git 2.0
To stage your whole working tree:
$ git add -u :/
To stage just the current path:
$ git add -u .
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How to read the mode field of git-ls-tree's output
...ing 0 on the top lines (e.g. 0170000 instead of 170000), since it is 0 for all lines, why not just omit it?
– Ciro Santilli 郝海东冠状病六四事件法轮功
Aug 22 '14 at 7:47
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What Makes a Method Thread-safe? What are the rules?
Are there overall rules/guidelines for what makes a method thread-safe? I understand that there are probably a million one-off situations, but what about in general? Is it this simple?
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Record file copy operation with Git
...n (-C implies -M), and you can request more expensive copy detection among all files with --find-copies-harder or -C -C (which implies -C, which implies -M). See the git-diff manpage.
You can also configure git to always do rename detection by setting diff.renames to a boolean true value (e.g. true...