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filter for complete cases in data.frame using dplyr (case-wise deletion)
... works for me:
df %>%
filter(complete.cases(df))
Or a little more general:
library(dplyr) # 0.4
df %>% filter(complete.cases(.))
This would have the advantage that the data could have been modified in the chain before passing it to the filter.
Another benchmark with more columns...
Is LINQ to SQL Dead or Alive?
...context)
Initializers
Property default implementation (a shorthand)
Read more here.
In VB 9.0 there's some inline XML magic, and many other things (many are similar to the above list for C#).
Read more here.
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Select arrow style change
... looks like Firefox doesn't support this feature up until version 35 (read more here)
There is a workaround here, take a look at jsfiddle on that post.
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Why are unsigned int's not CLS compliant?
... of value types supported. Also when you think about the longer term where more and more languages are being ported to the CLR why force them to implement unsigned ints to gain CLS compliance if there is absolutely no concept, ever?
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Javascript/DOM: How to remove all events of a DOM object?
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Have you tried this with more than one div element? the node var will actually be converted to a string, e.g. '[object HTMLDivElement]' which means you end up adding everything to the same node.
– cstruter
Feb 2...
What are the most common SQL anti-patterns? [closed]
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118
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Convert string with comma to integer
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Some more convenient
"1,1200.00".gsub(/[^0-9]/,'')
it makes "1 200 200" work properly aswell
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add created_at and updated_at fields to mongoose schemas
...This will return the following output:
ISODate("2012-10-15T21:26:17Z")
More info here How do I extract the created date out of a Mongo ObjectID
In order to add updated_at filed you need to use this:
var ArticleSchema = new Schema({
updated_at: { type: Date }
// rest of the fields go here
}...
What's the best way to distribute Java applications? [closed]
...e a company.
Use launch4j and an installer like NSIS. This gives you a lot more control, although the user can still do stupid stuff like un-installing the java runtime. This is probably the most popular approach, and what I currently use.
Use Webstart. This also assumes that the user has the correc...
Does MySQL ignore null values on unique constraints?
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note: this also works also unique indexes that have more columns. So if you want columns a, b and c to be unique you can still have in the table double rows with null, b, c
– Mihai Crăiță
Oct 13 '19 at 8:39
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