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From an array of objects, extract value of a property as array
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Here is a shorter way of achieving it:
let result = objArray.map(a => a.foo);
OR
let result = objArray.map(({ foo }) => foo)
You can also check Array.prototype.map().
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filter for complete cases in data.frame using dplyr (case-wise deletion)
Is it possible to filter a data.frame for complete cases using dplyr? complete.cases with a list of all variables works, of course. But that is a) verbose when there are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
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Nginx serves .php files as downloads, instead of executing them
I am installing a website in a droplet (Digital Ocean). I have a issue for install NGINX with PHP properly. I did a tutorial https://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-14-04 but when I try to run some .php file it's just downloading i...
Run/install/debug Android applications over Wi-Fi?
...ought there was a way to test your applications in development over Wi-Fi. Is this possible?
34 Answers
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CSS to make HTML page footer stay at bottom of the page with a minimum height, but not overlap the p
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A simple method is to make the body 100% of your page, with a min-height of 100% too. This works fine if the height of your footer does not change.
Give the footer a negative margin-top:
footer {
clear: both;
position: relative;
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Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
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The problem is that when you have a macro replacement, the preprocessor will only expand the macros recursively if neither the stringizing operator # nor the token-pasting operator ## are applied to it. So, you have to use some extra la...
What is the minimum length of a valid international phone number?
...of an international phone number. According to E.164 , the maximum length is 15 digits, but I was unable to find any information about the minimum. I consider digits only, no plus sign or separators.
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How to elegantly ignore some return values of a MATLAB function?
Is it possible to get the 'nth' return value from a function without having to create dummy variables for all n-1 return values before it?
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How to disable Golang unused import error
...port as error, forcing you to delete the import.
I want to know if there exists some hope to change to this behavior, e.g. reducing it to warning.
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How to select a CRAN mirror in R
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You should either get a window with a list of repositories or a text menu with some options. But if that is not appearing, you can always specify the mirror from where to download the packages yourself by using repos parameter. By doing that, R will not ask you an...