a thoughtful use of digital
You could have problems with an external hard disk, such as safely removing it (even after unmounting it). In this case you could try this code:
sudo hdparm -Y /dev/[your device: something like sde1 or sdh1]Another problem could be the impossibility to mount your external hd. In this case, if the hd has an ntfs filesystem, you could try this code:
sudo ntfsfix /dev/[your device]I found this last code on www.makeuseof.com.
To hide an element you can use css: element:empty (such as p:empty) {display:none}, or img[src=""] {display:none}.
You can, even with PDO, use this syntax
if ($data[0]['somecolumn'] != '') {echo " " . $data[0]['somecolumn'] . "";}
Two ways:
you can use this code
mkvmerge -o outfile.mkv infile_01.mp4 \+ infile_02.mp4 \+ infile_03.mp4by using f.e. Avidemux:
If your SSD has become slow, it could depend from the swap file: f.e. in fstab the ssd swap UUID could be wrong (after some partitions changes in your SSD).
You can fix this by giving to the swap partition the correct UUID.
Unlike MyIsam tables, the Innodb ones cannot be symlinked by the file manager.
You can instead use this code:
CREATE SQL SECURITY DEFINER VIEW targetdatabase.tablename AS SELECT
*
FROM
sourcedatabase.tablenameYou could have to replace several “whatever”, f.e. in a sql file I had to replace many columns with dates, such as ‘2005-08-15’ splitting them in ‘2005’, ’08’, ’15’.
I manage to do it with this code:
find NULL, '(.*?)-(.*?)-(.*?)', NULL, NULL, NULL replace NULL, '\1', '\2', '\3', NULL
In this way you can replace '2005-08-15', NULL, NULL, NULL with '2005', '08', '15', NULL, and likewise all the like, such as '2012-06-23', NULL, NULL, NULL with '2012', '06', '23', NULL and so on.
But, be careful: make a backup of your file before.
another case: if you want replace several digits with the same digits formatted, you can try something like this code:
search: ^ (\d{2})$
replace: <h2>cap. \1</h2>\n
‘Details’ html tag is a very easy way to collapse/expand a web content: you can see it in the following example. This is the code:
<details>
<summary>expansible title</summary>
<p>all the content you want: text, images, video, in a nutshell: all possible content</p>
</details>and this is the result:
all the content you want: text, images, video, in a nutshell: all possible content
But there is a problem: the collapsed content is not reachable unless you click over his ‘summary’ (in the example above: ‘expansible title’) . Therefore a link from outside the details content toward some element inside that, doesn’t work, because it cannot open it.
To fix this problem you can use a little javascript:
const openDetailsIfAnchorHidden = evt => {
const targetDIV = document.querySelector(evt.target.getAttribute("href"));
if ( !! targetDIV.offsetHeight || targetDIV.getClientRects().length ) return;
targetDIV.closest("details").open = true;
}
[...document.querySelectorAll("[href^='#']")].forEach(
el => el.addEventListener("click", openDetailsIfAnchorHidden )
);to be put at the bottom of a page (otherwise it doesn’t work).
In LibreWriter the best way to create and edit an alphabetical index is to use a concordance file, in wich you can add, edit or delete entries (otherwise you can only add entries).
As “alternative entry” you can set the name actually shown in your index.
I noticed that the very good and simple code systemlanguage, such in the following example
<switch>
<text x="400" y="500" systemLanguage="en">
<tspan dy="-50">Love comes</tspan>
<tspan x="400" dy="200">through the stomach.</tspan>
</text>
<text x="400" y="500" systemLanguage="de">
<tspan dy="-50">Liebe geht</tspan>
<tspan x="400" dy="200">durch den Magen.</tspan>
</text>
<text x="400" y="500" systemLanguage="es">
<tspan dy="-50">El amor entra</tspan>
<tspan x="400" dy="200">por el estómago.</tspan>
</text>
<text x="400" y="500" systemLanguage="fr">
<tspan dy="-50">L'amour passe</tspan>
<tspan x="400" dy="200">par l'estomac.</tspan>
</text>
</switch> unfortunately doesn’t work: the browsers don’t recognize it.
I have successfully used for several years a pure css menu, without javascript. But the problem now is that it is not enough reponsible with mobile devices. I mean that the maximum that can it be asked is to show (correctly) the main entries (disabling the drop-down from them).
I tried the new release of that css menu : but the main problem of this new, and responsive release (with some aiax script, though) it that by clicking on the hamburger icon all menu levels are shown. And If you have more than 50 entries it is a too long list.
To get a drop-down pure css reponsive menu, because of the limits of our current browsers, it is necessary use input and label tags (in a terrible: non-sematic way). This is the way of this attempt: no bad (no js, only css and that trick), but very hard to import in a previous menu.
Another attempt was following an example of collapsible responsive menu w3cschools: a code very simple and lovable, so to say, but here too: very difficult import in a previous, complex, menu.