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.NET - Dictionary locking vs. ConcurrentDictionary
...enough information on ConcurrentDictionary types, so I thought I'd ask about it here.
8 Answers
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Parse query string into an array
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Something to watch out for are strings that include '+', like myemail+alias@gmail.com. These will be parsed by parse_str to a space. key=myemail alias@gmail.com.
– dudeman
Aug 26 '16 at 23:41
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Accessing the index in 'for' loops?
...hon 2 and 3:
for idx, val in enumerate(ints):
print(idx, val)
Check out PEP 279 for more.
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How can I get a JavaScript stack trace when I throw an exception?
...MDN Reference)
Edit 1 (2013):
A better (and simpler) solution as pointed out in the comments on the original question is to use the stack property of an Error object like so:
function stackTrace() {
var err = new Error();
return err.stack;
}
This will generate output like this:
DBX.Uti...
What's the best/easiest GUI Library for Ruby? [closed]
Whats the best/easiest GUI library out there for Ruby?
19 Answers
19
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Real differences between “java -server” and “java -client”?
...ve optimization technology is very flexible in its approach, and typically outperforms even advanced static analysis and compilation techniques.
Note: The release of jdk6 update 10 (see Update Release Notes:Changes in 1.6.0_10) tried to improve startup time, but for a different reason than the hots...
Fastest way to count exact number of rows in a very large table?
...UNT(*)
There are approximate SQL Server solutions but don't use COUNT(*) = out of scope
Notes:
COUNT(1) = COUNT(*) = COUNT(PrimaryKey) just in case
Edit:
SQL Server example (1.4 billion rows, 12 columns)
SELECT COUNT(*) FROM MyBigtable WITH (NOLOCK)
-- NOLOCK here is for me only to let me test...
What is a “slug” in Django?
... Good description, but to add: SlugField doesn't ensure uniqueness out of the box, so if using it by default, this is a better URL: www.example.com/article/the-40-year-old-virgin/23/ Where '23' is the article.id, and is what's actually used to do the query (also faster than querying on the...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...empty_level"))
# Species is a factor and empty groups are included in the output
iris %>% group_by(Species, .drop=FALSE) %>% tally
#> Species n
#> 1 setosa 50
#> 2 versicolor 50
#> 3 virginica 50
#> 4 empty_level 0
# Add character column
iris$gr...
gdb split view with code
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you can also use layout next after starting gdb normally
– khaverim
Oct 30 '18 at 21:13
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