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sed or awk: delete n lines following a pattern
...ber of lines to skip. The first sed command transforms the file into a sed script that performs the corresponding matching and skipping; that script is provided via -f and stdin (-) to the 2nd sed command. The 2nd sed command operates on a sample ad-hoc input file formed from the output of seq 21 to...
How to correctly use “section” tag in HTML5?
...When an
element is needed for styling purposes or as a convenience for
scripting, authors are encouraged to use the div element instead. A
general rule is that the section element is appropriate only if the
element's contents would be listed explicitly in the document's
outline.
Referenc...
How to write file if parent folder doesn't exist?
...path = require('path');
function mkDirByPathSync(targetDir, { isRelativeToScript = false } = {}) {
const sep = path.sep;
const initDir = path.isAbsolute(targetDir) ? sep : '';
const baseDir = isRelativeToScript ? __dirname : '.';
return targetDir.split(sep).reduce((parentDir, childDir) =&g...
How to log PostgreSQL queries?
...ot over a time, and might kill your machine. For your safety, write a bash script that'll delete logs and restart postgresql server.
Thanks @paul , @Jarret Hardie , @Zoltán , @Rix Beck , @Latif Premani
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Is there a better way to run a command N times in bash?
...rying to understand what I did, I'd probably wrap the confusion in a shell script and just call it with repeat.sh repeatcount some_command. For implementation in the shell script I might use parallel, if it was already installed on the machine (probably wouldn't be). Or I might gravitate towards xar...
orderBy multiple fields in Angular
...nce and toggles ascending/descending for the complete array list set:
<script>
app.controller('myCtrl', function ($scope) {
$scope.sortArray = ['name'];
$scope.sortReverse1 = false;
$scope.searchProperty1 = '';
$scope.addSort = function (x) {
if...
Reading value from console, interactively
...
Beautiful. Async await is needed for larger scripts. This is exactly what I needed.
– Abhay Shiro
Mar 19 at 10:54
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How do I fit an image (img) inside a div and keep the aspect ratio?
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You will need some JavaScript to prevent cropping if you don't know the dimension of the image at the time you're writing the css.
HTML & JavaScript
<div id="container">
<img src="something.jpg" alt="" />
</div>
<scr...
jQuery Determine if a matched class has a given id
...div:eq(1)').hasId('foo') ?
console.log('yes') : console.log('no');
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="mydiv" id="foo"></div>
<div class="mydiv"></div>
...
How can I quickly sum all numbers in a file?
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Your awk script should execute a bit faster if you use $0 instead of $1 since awk does field splitting (which obviously takes time) if any field is specifically mentioned in the script but doesn't otherwise.
– Ed...