what exactly mean 2160p, 1440p, 1080p, … 144p? [closed]

it is the pixel count. 1200×700 simply means: 1200 pixels in width and 700 pixels in height so 1920×480 would not choose one of the other resolutions, it would stretch the video the 360p here actually stands for the height. With this value and the screen ratio you can calculate the real resulotion. so lets asume you use a typical 16:9 screen: … Read more

What’s the difference between passing by reference vs. passing by value?

First and foremost, the “pass by value vs. pass by reference” distinction as defined in the CS theory is now obsolete because the technique originally defined as “pass by reference” has since fallen out of favor and is seldom used now.1 Newer languages2 tend to use a different (but similar) pair of techniques to achieve the same effects (see below) which … Read more

ggplot wrong color assignment

As you want to supply color names to argument colour= and display also a legend for this argument, you should add scale_colour_identity() to your last line in function. This scale ensures that values supplied will be interpreted as actual color values. Adding of argument breaks=cols_hex in function scale() will ensure ordering of names in legend.

Meaning of “! -S” in shell script

The command you are looking at is actually this: Although it looks like punctuation, [ is actually the name of a command, also called test; so the command can also be written like this: Which in context would look like this: As the name suggests, its job is to test some attribute of a string, … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)