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How to exit if a command failed?
...on-zero).
Using ( ) makes the command inside them run in a sub-shell and calling a exit from there causes you to exit the sub-shell and not your original shell, hence execution continues in your original shell.
To overcome this use { }
The last two changes are required by bash.
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Read environment variables in Node.js
...bles per project:
Create a .env file under the project directory and put all of your
variables there.
Add this line in the top of your application entry file:
require('dotenv').config();
Done. Now you can access your environment variables with process.env.ENV_NAME.
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Java - No enclosing instance of type Foo is accessible
...provide runtime arguments makes it a bother to use a main method. This was all I needed and exactly what I was looking to find.
– Abandoned Cart
Jul 27 '16 at 6:03
add a comme...
data.table vs dplyr: can one do something well the other can't or does poorly?
...j and by together is by design. By keeping related operations together, it allows to easily optimise operations for speed and more importantly memory usage, and also provide some powerful features, all while maintaining the consistency in syntax.
1. Speed
Quite a few benchmarks (though mostly on g...
Unresolved external symbol in object files
... because the dll was not in memory and had to be loaded via a LoadLibrary call. (FTR)
– tmj
Sep 2 '14 at 10:08
2
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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
...d FROM sourcecodes) should help to get rid of those IDs. Or if null is not allowed in sourcecode_id, then remove those rows or add those missing values to the sourcecodes table.
– naXa
Feb 23 '16 at 14:28
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How to edit incorrect commit message in Mercurial? [duplicate]
I am currently using TortoiseHg (Mercurial) and accidentally committed an incorrect commit message. How do I go about editing this commit message in the repository?
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Create a CSV File for a user in PHP
...ord2,record3\n";
die;
etc
Edit: Here's a snippet of code I use to optionally encode CSV fields:
function maybeEncodeCSVField($string) {
if(strpos($string, ',') !== false || strpos($string, '"') !== false || strpos($string, "\n") !== false) {
$string = '"' . str_replace('"', '""', $st...
Navigation in django
...
I like this idea a lot, especially for flexibility, but it comes with the less-DRY trade-off. I did start using this in a site though.
– anonymous coward
Sep 22 '09 at 14:47
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Close iOS Keyboard by touching anywhere using Swift
I have been looking all over for this but I can't seem to find it. I know how to dismiss the keyboard using Objective-C but I have no idea how to do that using Swift ? Does anyone know?
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