gsf - change to fake style, e.g. foo = ‘fake_foo’gsp - change to param stylenonnull and
required=Truedjango-adminsqlmigrate oneview 0274 --backwardsEnumScrupulous writers, in every sentence that they write, will ask themselves at least four questions:
Two more that they may ask are:
Consequently there are ways to write well. The following rules will cover most cases:
doc string if there is anything unclearfish
instead bashhexadecimal dump of ascii charaters
from man ascii
The control characters in ASCII still in common use include:
0x00 (null, NUL, \0, ^@), originally intended to be
an ignored character, but now used by many programming languages
including C to mark the end of a string.
0x07 (bell, BEL, \a, ^G), which may cause the device
to emit a warning such as a bell or beep sound or the screen
flashing.
0x08 (backspace, BS, \b, ^H), may overprint the
previous character.
0x09 (horizontal tab, HT, \t, ^I), moves the
printing position right to the next tab stop.
0x0A (line feed, LF, \n, ^J), moves the print head
down one line, or to the left edge and down. Used as the end of line
marker in most UNIX systems and variants.
0x0B (vertical tab, VT, \v, ^K), vertical
tabulation.
0x0C (form feed, FF, \f, ^L), to cause a printer to
eject paper to the top of the next page, or a video terminal to clear
the screen.
0x0D (carriage return, CR, \r, ^M), moves the
printing position to the start of the line, allowing overprinting. Used
as the end of line marker in Classic Mac OS, OS-9, FLEX (and variants).
A CR+LF pair is used by CP/M-80 and its derivatives including DOS and
Windows, and by Application Layer protocols such as FTP, SMTP, and
HTTP.
0x1A (Control-Z, SUB, ^Z), Acts as an end-of-file
for the Windows text-mode file i/o.
0x1B (escape, ESC, \e (GCC only), ^[). Introduces an
escape sequence.
Control characters may be described as doing something when the user inputs them, such as code 3 (End-of-Text character, ETX, ^C) to interrupt the running process, or code 4 (End-of-Transmission character, EOT, ^D), used to end text input on Unix or to exit a Unix shell. These uses usually have little to do with their use when they are in text being output.
to see the hex value for characters
od -t a -t x1 -t c
-t a - prints in ascii format-t x1 - prints in hex format-t c - prints in c escape formate.g.
> printf '\0\a\b\n\r\t\v ' | od -t a -t x1 -t c
0000000 nul bel bs nl cr ht vt sp
00 07 08 0a 0d 09 0b 20
\0 \a \b \n \r \t \v
0000010explanation, engineering,
\033[XXXm is Select Graphic Rendition subset of ANSI
escape sequences, \033 is actually ESC character in ascii
octal format, \e is equivalent in zsh shell, however, don’t
use \e, \e is not recognised in
awk nor python.
> echo "\033[31mRed Text\033[0m"
Red Text
> echo "\e[31mRed Text\e[0m"
Red Text\033[ - Begin the color modificationsCODEm - CODE + m at the end\e[0m - End the color modifications| code | description |
|---|---|
30, 90 |
fg black |
31, 91 |
fg red |
32, 92 |
fg green |
33, 93 |
fg brown |
34, 94 |
fg blue |
35, 95 |
fg purple |
36, 96 |
fg cyan |
37, 96 |
fg light grey |
40 |
bg black |
41 |
bg red |
42 |
bg green |
43 |
bg brown |
44 |
bg blue |
45 |
bg purple |
46 |
bg cyan |
47 |
bg light grey |
0 |
reset / normal |
1 |
bold |
3 |
italic |
4 |
underline |
> for i in {1..111}
do
echo '\\e['$i'm' "\e[${i}mtext\e[0m"
done | columnSee also: a comprehensive explanation
Authentication is the process of verifying that “you are who you say you are”
Authorization is the process of verifying that “you are permitted to do what you are trying to do”
A key feature of true event-driven architectures is that the producers and consumers are completely decoupled – a producer shouldn’t know or care who is consuming its events and how the consumers use those events in their service..
Examples
Two key characteristics of event-based compute
Examples
See also origin of this idea # full development cycle - backlog refinement meeting and estimations - planning meeting - business requirements epic and tickets (Happy Path, Unhappy Path) - FE & BE contract, API Specs - Infrastructure As Code Setup, feature flags, - code logics implementation - clarify requirements in ticket - code documentations - lints - unittests - code reviews - developer manual e2e tests - QA / functional testings (deploy to test env, setup test accounts) - deployment and rollbacks - monitoring - engineering: errors, retrospective debugging logs, checking database - dev ops: CPU, Memory, number of invokes, latency, throughputs - add or change features - software support
SaaS is a business and software delivery model that gives organisations the ability to offer their solutions in a low-friction, service-centric model that maximises value for customers and providers. It relies on agility and operational efficiency as pillars of a business strategy that promotes growth, reach and innovations.
Typically,
Importantly, if some text is encrypted with private key, only public key can decrypted it.
If some text is encrypted with public key, only private key can decrypted it.
For example, HTTPS handshake is basically, I get the Public Key of a website, generate a random password, encrypt it with Public Key and then send it to the website server and then website server uses Private Key to decrypt the password, so this password is shared. And further communication is encrypted using that shared password.
But really, public key isn’t just for encryption nor private for decryption, the otherway around works too, private key can be used for encryption and public key for decryption.
One example that uses private key for encryption is digital signature, take some text/file, create a digest of test/file, encrypt the digest with private key and send the encrypted digest together with the text/file. Then if the public key successfully decrypt the encrypted digest and the digest matches then we know the test/file is the original, because the only key that can encrypt something that can be decrypt with public key is the private key.
The only reason public and private keys are not interchangeable is because you can recreate the public key from private key.