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We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

Beware! The first example isn't thread-safe and will have race conditions. ref guarantees transactional consistency (think multiple refs in one dosync) but that will still allow multiple threads to read the same value at a given point in time. The second example will probably work but is somewhat suboptimal as it may run multiple times and it may not be very efficient to compare a (very long) list for equality on each iteration.

olieidel
– olieidel

2018-12-21 21:08:22 +00:00
Commented Dec 21, 2018 at 21:08

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Correct minor typos or mistakes
Clarify meaning without changing it
Add related resources or links
Always respect the author’s intent
Don’t use edits to reply to the author

create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)

<https://example.com>

[example](https://example.com)

<a href="https://example.com">example</a>

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