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Check if image exists on server using JavaScript?
...but keep in mind that it takes longer to process the request and isn't the best solution. Also it doesn't work on cross origin (definitely in chrome) so you can't use it on file:/// protocol which means no local usage.
– Cameron
May 20 '17 at 22:40
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Is it possible to print a variable's type in standard C++?
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This technique is also described in "Item 4: Know how to view deduced types" in Effective Modern C++
– lenkite
Jun 7 '19 at 16:57
add a c...
How do I get the name of the current executable in C#?
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This the best answer for me because Environment.GetCommandLineArgs() is the exact C# analogue of argv from C/C++.
– Frederick The Fool
Jun 3 '12 at 6:45
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Can I pass parameters by reference in Java?
... AtomicReference and corresponding classes (AtomicInteger) are best for such operations
– Naveen
Jul 13 '11 at 19:50
3
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Show percent % instead of counts in charts of categorical variables
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As of March 2017, with ggplot2 2.2.1 I think the best solution is explained in Hadley Wickham's R for data science book:
ggplot(mydataf) + stat_count(mapping = aes(x=foo, y=..prop.., group=1))
stat_count computes two variables: count is used by default, but you can choos...
How to convert a Map to List in Java?
What is the best way to convert a Map<key,value> to a List<value> ? Just iterate over all values and insert them in a list or am I overlooking something?
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How to create an alias for a command in Vim?
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This is the single best tip for vim. I'm so used to it now that every time I encounter the normal behavior, it takes me a few tried to get my mind retrained.
– airstrike
Feb 24 '15 at 19:58
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Any way to delete in vim without overwriting your last yank? [duplicate]
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This is by far the best answer here. Thanks.
– Stickley
Oct 30 '13 at 20:21
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Is there a pretty print for PHP?
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The best I found yet is this:
echo "<pre>";
print_r($arr);
echo "</pre>";
And if you want it more detailed:
echo "<pre>";
var_dump($arr);
echo "</pre>";
Adding a <pre> HTML tag in a web devel...
What is the optimal Jewish toenail cutting algorithm?
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Actually, I like your original algorithm best.
Since 14 out of 120 permutations work, 106 out of 120 do not. So each check has a 106/120 chance of failing.
That means the expected number of failures is:
1*(106/120) + 2*(106/120)^2 + 3*(106/120)^3 + ...
Not too...