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How to prevent Node.js from exiting while waiting for a callback?
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I did look at felixge/node-mysql library and didn't see a reference to the command client.connect in the API. Is this the actual call you're trying to make (not trying to be nitpicky here)? Regardless, IMHO you need to think more about how Javascript...
Bash Templating: How to build configuration files from templates with Bash?
...th care, of course, since eval can execute arbitrary code. Running this as root is pretty much out of the question. Quotes in the template need to be escaped, otherwise they will be eaten by eval.
You can also use here documents if you prefer cat to echo
$ eval "cat <<< \"$(<template.t...
What are .NET Assemblies?
...le property of one application only. It is generally stored in application root folder
Public/Shared assembly:
It is a dll which can be used by multiple applications at a time. A shared assembly is stored in GAC i.e Global Assembly Cache.
Sounds difficult? Naa....
GAC is simply C:\Windows\Assembl...
Is it possible to reference one CSS rule within another?
...ariable") instead of any part of a value of another property.
Example:
:root {
--main-bg-color: yellow;
}
@media (prefers-color-scheme: dark) {
:root {
--main-bg-color: black;
}
}
body {
background-color: var(--main-bg-color);
}
...
Why does typeof NaN return 'number'?
...ctions.
Real operations with complex results:
The square root of a negative number
The logarithm of a negative number
The tangent of an odd multiple of 90 degrees (or π/2 radians)
The inverse sine or cosine of a number which is less than −1 or
greater than +1.
Al...
Excel to CSV with UTF8 encoding [closed]
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Needed to export an XLS as CSV to import in MySQL. Using Excel 2003 I exported in format "Unicode Text (.txt)", then used Notepad++ to replace the TAB with ;, then imported the txt-file into phpmyadmin with default "Character set of the file: utf-8", Format "CSV using ...
Laravel orderBy on a relationship
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If you use mysql strict mode, which is default in Laravel 5.4 ,f.ex you'll receive SQLSTATE[42000]: Syntax error or access violation: 1140 Mixing of GROUP columns ...
– Sabine
Feb 18 '17 at 15:15
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Computed / calculated / virtual / derived columns in PostgreSQL
...s defined in the SQL standard and implemented by some RDBMS including DB2, MySQL and Oracle. Nor the similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS...
Why should I use document based database instead of relational database?
... my schema, I am constantly frustrated by having to maintain the schema in MySQL/SQLite. While I've not done too much with CouchDB yet, I do like how simple it is to evolve the schema during the RAD process.
A case where you might not want to use a non-relational database is when you have a lot of ...
Using Emacs to recursively find and replace in text files not already open
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M-x find-name-dired: you will be prompted for a root directory and a filename pattern.
Press t to "toggle mark" for all files found.
Press Q for "Query-Replace in Files...": you will be prompted for query/substitution regexps.
Proceed as with query-replace-regexp: SPACE to...