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Recompile Heroku slug without push or config change
...swer. It's true that a git pre-receive hook compiles the slug. (see, for example: devcenter.heroku.com/articles/slug-compiler). That doesn't necessarily mean that heroku doesn't (or couldn't) provide an alternate mechanism to invoke the slug compilation such as a heroku CLI command. That said, no ...
Joining three tables using MySQL
... answered Sep 21 '10 at 6:21
PHP FerrariPHP Ferrari
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Cartesian product of multiple arrays in JavaScript
...S
Original 2017 Answer: 2-line answer with vanilla JS:
(see updates below)
All of the answers here are overly complicated, most of them take 20 lines of code or even more.
This example uses just two lines of vanilla JavaScript, no lodash, underscore or other libraries:
let f = (a, b) => [].concat...
Unix command to find lines common in two files
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@bapors: I've provided a self-answered Q&A as How to get the output from the comm command into 3 separate files? The answer was much too big to fit comfortably here.
– Jonathan Leffler
Sep 21 '17 at 5:56
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Change the default editor for files opened in the terminal? (e.g. set it to TextEdit/Coda/Textmate)
...lt by this. Here's how to add it to OSX: http://hints.macworld.com/article.php?story=20021017065800302
– Micer
Nov 5 '13 at 0:09
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How do I parse command line arguments in Bash?
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Last line of file specified as non-opt/last argument:
#93.184.216.34 example.com
Bash Equals-Separated (e.g., --option=argument) (without getopt[s])
Usage demo-equals-separated.sh -e=conf -s=/etc -l=/usr/lib /etc/hosts
cat >/tmp/demo-equals-separated.sh <<'EOF'
#!/bin/bash
for i in...
Laravel Check If Related Model Exists
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In php 7.2+ you can't use count on the relation object, so there's no one-fits-all method for all relations. Use query method instead as @tremby provided below:
$model->relation()->exists()
generic solution working on...
Logical operators for boolean indexing in Pandas
...t boolean evaluation, you want element-wise logical-and. That is what the & binary operator performs:
(a['x']==1) & (a['y']==10)
returns a boolean array.
By the way, as alexpmil notes,
the parentheses are mandatory since & has a higher operator precedence than ==.
Without the par...
Stretch and scale a CSS image in the background - with CSS only
...e with all browsers.
I do this dynamically for each page. Therefore I use PHP to generate its own HTML tag for each page. All the pictures are in the 'image' folder and end with 'Bg.jpg'.
<html style="
background: url(images/'.$pic.'Bg.jpg) no-repeat center center fixed;
-webkit-bac...
PHP Timestamp into DateTime
...romFormat('U', $timeStamp);
Where 'U' means Unix epoch. See docs: http://php.net/manual/en/datetime.createfromformat.php
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