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Why does Date.parse give incorrect results?
...the "Z" specifier indicates that the input is in UTC time so is not offset from the epoch and the result is 0
In the second case, the "-0500" specifier indicates that the input is in GMT-05:00 and both browsers interpret the input as being in the -05:00 timezone. That means that the UTC value is off...
In Jinja2, how do you test if a variable is undefined?
Converting from Django, I'm used to doing something like this:
6 Answers
6
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Elegant way to check for missing packages and install them?
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Yes. If you have your list of packages, compare it to the output from installed.packages()[,"Package"] and install the missing packages. Something like this:
list.of.packages <- c("ggplot2", "Rcpp")
new.packages <- list.of.packages[!(list.of.packages %in% installed.packages()[,"Pac...
How do I update each dependency in package.json to the latest version?
I copied package.json from another project and now want to bump all of the dependencies to their latest versions since this is a fresh project and I don't mind fixing something if it breaks.
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What's the difference between ContentControl and ContentPresenter?
...o be used as-is while ContentControl is designed to be extended (inherited from)
– Nir
Jul 22 '11 at 21:26
25
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Simplest code for array intersection in javascript
...ersection = new Set([...setA].filter(x => setB.has(x)));
return Array.from(intersection);
}
Shorter, but less readable (also without creating the additional intersection Set):
function intersect(a, b) {
var setB = new Set(b);
return [...new Set(a)].filter(x => setB.has(x));
}
Note t...
What is the “right” JSON date format?
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It is maybe also worth mentioning that (milli)seconds from 1970 isn't predictable for dates in the future because we have leap seconds. So I wouldn't use if for inter-process communication and data storage. It is however nice to use internally in a program since it can be stored...
log4j: Log output of a specific class to a specific appender
... @dwjohnston setting additivity to false will prevent the logger from logging to the appenders of it's ancestors (it's true by default), In this case, had the additivity been left to true, logging to the Baz appender would have written to both files.
– Maurice Perry
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Where is C not a subset of C++? [closed]
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@Imagist: I usually hear the opposite from C programmers. They consider it poor style to add the cast, as it may conceal bugs. Good C code does not use the cast.
– jalf
Jul 29 '09 at 17:21
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How to create an infinite loop in Windows batch file?
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And from cmd prompt?
– theonlygusti
Mar 13 '15 at 16:11
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