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Fastest way to replace NAs in a large data.table
... na.replace = function(v,value=0) { v[is.na(v)] = value; v }
for (i in names(dt))
eval(parse(text=paste("dt[,",i,":=na.replace(",i,")]")))
}
system.time(a_gdata = f_gdata(dt1))
user system elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vec...
How do I enter RGB values into Interface Builder?
...p an exact color from anywhere on the screen; also see @ken's excellent comment below clarifying how colorspaces work with the magnifying glass.
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How to organize a node app that uses sequelize?
...down for info)
It's old and limited in many ways!
First, as @jinglesthula mentioned in comments (and I experienced it too) - there are problems with requiring those files. It's because require doesn't work the same way as readdirSync!
Second - you are very limited in relations - the code doesn't p...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
What is the most efficient way to organise the following pandas Dataframe:
4 Answers
4...
Django - how to create a file and save it to a model's FileField?
...ccessed, gives you an instance of class FieldFile, which gives you several methods to interact with the underlying file. So, what you need to do is:
self.license_file.save(new_name, new_contents)
where new_name is the filename you wish assigned and new_contents is the content of the file. Note th...
What does -save-dev mean in npm install grunt --save-dev
...ear in your devDependencies.
According to the npm install docs.
If someone is planning on downloading and using your module in their program, then they probably don't want or need to download and build the external test or documentation framework that you use.
In other words, when you run np...
String output: format or concat in C#?
...ne as it's probably few orders of magnitude slower than what I'm trying to measure.
2. I'm starting the Stopwatch before the loop and stopping it right after, this way I'm not losing precision if the function takes for example 26.4 ticks to execute.
3. The way you divided the result by some iterati...
How to convert an enum type variable to a string?
...a lot of output, you can define an operator<< that takes an enum parameter and does the lookup for you.
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Troubleshooting “The use statement with non-compound name … has no effect”
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PHP's use isn't the same as C++'s using namespace; it allows you to define an alias, not to "import" a namespace and thus henceforth omit the namespace qualifier altogether.
So, you could do:
use Blog\Article as BA;
... to shorten it, but you ...
SQL update trigger only when column is modified
By looking at other examples I've come up with the following but it doesn't seem to work as I would like: I want it to only update the modified information if the QtyToRepair value has been updated... but it doesn't do that.
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