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What's the difference between `1L` and `1`?
....but also note that working excessively with integers can be dangerous:
1e9L * 2L # Works fine; fast lean and mean!
1e9L * 4L # Ooops, overflow!
...and as @Gavin pointed out, the range for integers is roughly -2e9 to 2e9.
A caveat though is that this applies to the current R version (2.13). R m...
Compare two dates with JavaScript
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avoiding == or === to get desired result: jsfiddle.net/P4y5J now >= anotherNow && now <= anotherNow IS true FYI
– Jason Sebring
Apr 15 '14 at 19:42
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Convert string with commas to array
...Function("return [" + objectstring+ "];")());
JSFiddle https://jsfiddle.net/7ne9L4Lj/1/
Result in console
Some practice doesnt support object strings
- JSON.parse("[" + string + "]"); // throw error
- string.split(",")
// unexpected result
["{Name:"Tshirt"", " CatGroupName:"Clothes"",...
How do you sign a Certificate Signing Request with your Certification Authority?
...:eb:f5:af:f6:1e:48:a5:c7:
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cd:c6:ac:30:f9:15:83:41:c1:d1:20:fa:85:e7:4f:35:8f:b5:
38:ff:fd:55:68:2c:3e:37
And test its purpose with the following (don't worry about the Any Purpose: Yes; see "critical,CA:FALSE" but "Any Purpose CA : Yes").
$ openssl x509 -purpose -in...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...ls(?), no manual loop unfolding! Details are available in: cr.openjdk.java.net/~vlivanov/talks/…
– Vedran
Jun 23 '17 at 13:16
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get dictionary key by value
...e(dict, "two");
Console.WriteLine("Key: " + key);
}
Works on .NET 2.0 and in other limited environments.
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Converting .NET DateTime to JSON [duplicate]
... return ts.TotalMilliseconds;
}
}
Assuming you are developing against .NET 3.5, it's a straight copy/paste. You can otherwise port it.
You can encapsulate this in a JSON object, or simply write it to the response stream.
On the Javascript/JSON side, you convert this to a date by simply passin...
Mean per group in a data.frame [duplicate]
...48122)), .Names = c("Name", "Month", "Rate1", "Rate2"), row.names = c(NA, -9L), class = c("data.table", "data.frame"))
Now to take the mean of Rate1 and Rate2 for all 3 months, for each person (Name):
First, decide which columns you want to take the mean of
colstoavg <- names(mydt)[3:4]
Now ...
Read a file line by line assigning the value to a variable
...ing else (avoid the standard file descriptors), e.g.:
while IFS= read -r -u3 line; do
echo "Text read from file: $line"
done 3< "$1"
(Non-Bash shells might not know read -u3; use read <&3 instead.)
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Do try/catch blocks hurt performance when exceptions are not thrown?
...the compiled assembly code. The IL is just a common representation of all .NET languages. It is NOT machine code!
– awe
Sep 1 '09 at 8:06
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