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Elegant way to check for missing packages and install them?
...novice/intermediate R users and don't realize that they have to install packages they don't already have.
29 Answers
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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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Unpacking array into separate variables in JavaScript
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This is currently the only cross-browser-compatible solution AFAIK:
var one = arr[0],
two = arr[1];
ES6 will allow destructuring assignment:
let [x, y] = ['foo', 'bar'];
console.log(x); // 'foo'
console.log(y); // 'bar'
Or, to stick to your initial example:
var arr = ['one', '...
Remove files from Git commit
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I think other answers here are wrong, because this is a question of moving the mistakenly committed files back to the staging area from the previous commit, without cancelling the changes done to them. This can be done like Paritos...
Where is C not a subset of C++? [closed]
I read in a lot of books that C is a subset of C++.
12 Answers
12
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How can I quickly delete a line in VIM starting at the cursor position?
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thitonthiton
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Ruby: How to get the first character of a string
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You can use Ruby's open classes to make your code much more readable. For instance, this:
class String
def initial
self[0,1]
end
end
will allow you to use the initial method on any string. So if you have the following variables:
last_name = "Smith"...
Can comments be used in JSON?
...in the processes that generates/receives the JSON, as they are supposed to know what the JSON data will be in advance, or at least the structure of it.
But if you decided to:
{
"_comment": "comment text goes here...",
"glossary": {
"title": "example glossary",
"GlossDiv": {
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AsyncTask Android example
I was reading about AsyncTask , and I tried the simple program below. But it does not seem to work. How can I make it work?
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Regular expression to match any character being repeated more than 10 times
I'm looking for a simple regular expression to match the same character being repeated more than 10 or so times. So for example, if I have a document littered with horizontal lines:
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