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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...
When to use “ON UPDATE CASCADE”
...keys is a good & clean alternative to enums in my opinion (at least in MySQL DB flavors). For example, consider a table colors with rows blue, purple, yellow, and a table products with a product_color column, being FK'ed to the colors table. That restricts the choices like an enum, but unlike an...
SQL Query Where Field DOES NOT Contain $x
...
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Convert HTML + CSS to PDF [closed]
... from your browser
2) Use pdfToHtml !
1) extract pdftohtml.exe to your root folder:
2) inside that folder, in anyfile.php file, put this code (assuming, there is a source example.pdf too):
<?php
$source="example.pdf";
$output_fold="FinalFolder";
if (!file_exists($output_fold)) { mkdir...
Using Emacs to recursively find and replace in text files not already open
...
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...
SQL join: selecting the last records in a one-to-many relationship
... features of your RDBMS to analyze the optimization plan. E.g. EXPLAIN on MySQL.
Some people use subqueries instead of the solution I show above, but I find my solution makes it easier to resolve ties.
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Java client certificates over HTTPS/SSL
...te server, using a client certificate.
The server is using an selfsigned root certificate, and requires that a password-protected client certificate is presented. I've added the server root certificate and the client certificate to a default java keystore which I found in /System/Library/Framewor...
List All Redis Databases
...
There is no command to do it (like you would do it with MySQL for instance). The number of Redis databases is fixed, and set in the configuration file. By default, you have 16 databases. Each database is identified by a number (not a name).
You can use the following command to kn...
Hibernate Criteria returns children multiple times with FetchType.EAGER
...t the result transformer:
criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
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