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Most efficient method to groupby on an array of objects
...st collection = map.get(key);
if (!collection) {
map.set(key, [item]);
} else {
collection.push(item);
}
});
return map;
}
// example usage
const pets = [
{type:"Dog", name:"Spot"},
{type:"Cat", name:"Tiger"},
{type:"Dog", n...
How to get the nvidia driver version from the command line?
For debugging CUDA code and checking compatibilities I need to find out what nvidia driver version for the GPU I have installed. I found How to get the cuda version? but that does not help me here.
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What exactly does git's “rebase --preserve-merges” do (and why?)
...t have to worry about that.
Merge-preserving rebase considers a shallower set of commits for replay:
In particular, it will only consider replaying commits made since the most recent merge base(s) -- i.e. the most recent time the two branches diverged --, whereas normal rebase might replay commit...
How to use underscore.js as a template engine?
...d about node.js and express framework. Then I saw about underscore.js as a set of utility functions. I saw this question on stackoverflow
. It says we can use underscore.js as a template engine. anybody know good tutorials about how to use underscore.js for templating, especially for biginners who...
Setting the MySQL root user password on OS X
I just installed MySQL on Mac OS X. The next step was setting the root user password, so I did this next:
23 Answers
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Xcode “Build and Archive” from command line
...gning/profile used when the .app was built. This will be whatever you have set up in the Code Signing build settings for your Release configuration.
– Mike Weller
Apr 28 '11 at 13:53
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Passing command line arguments to R CMD BATCH
I have been using R CMD BATCH my_script.R from a terminal to execute an R script. I am now at the point where I would like to pass an argument to the command, but am having some issues getting it working. If I do R CMD BATCH my_script.R blabla then blabla becomes the output file, rather th...
Is there a common Java utility to break a list into batches?
I wrote myself a utility to break a list into batches of given size. I just wanted to know if there is already any apache commons util for this.
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Display filename before matching line
How can I get grep to display the filename before the matching lines in its output?
6 Answers
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Concatenating multiple text files into a single file in Bash
What is the quickest and most pragmatic way to combine all *.txt file in a directory into one large text file?
12 Answers
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