run_scaled linux
apt install xpra xvfb
git clone https://github.com/kaueraal/run_scaled.git
cd run_scaled/
cp run_scaled /usr/local/bin
chmod +x /usr/local/bin
run_scaled <yourapp>
@blog #linux #debian
Home
Einstein's Puzzle Solve
1.
x1 x2 x3 x4 x5
EN red
ES dog
UA tea
green x < white x
x3 milk
yellow x smoke Kool
NO x1
smoke Chesterfield fox
2.
x1 yellow x2 Blue x3 red x4 white x5 green
x1 yellow NO Kool
x2 blue horse
x3 EN milk
x4 white
x5 green coffee
Old gold snails
chesterfield fox
JA Parliament
Lucky strike Orange juce
3.
x1 yellow NO Kool
x2 Blue horse
x3 red EN drink milk
x4 white ES dog Lucky strike Orange juce
x5 green coffee JA Parliament
4.
x1 yellow NO Kool
x2 blue UA tea horse
x3 red EN drink milk old gold snails
x4 white ES dog Lucky strike Orange juce
x5 green coffee JA Parliament
The answer:
x1 yellow NO water fox Kool
x2 blue UA tea horse chesterfield
x3 red EN milk snails Old gold
x4 white ES juce dog Lucky strike
x5 green JA coffee zeebra Parliament
@blog
zsh
install
sudo apt install zsh
make default shell zsh:
chsh -s $(which zsh)
oh my zsh:
sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
copy plugins similar:
git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting
all plugins enum:
plugins=(git zsh-autosuggestions zsh-syntax-highlighting fast-syntax-highlighting)
hardcode install powerlevel10k:
git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k
Set ZSH_THEME="powerlevel10k/powerlevel10k" in ~/.zshrc
@blog #linux #ubuntu #debian
Spotify dbus
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.PlayPause
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Next
dbus-send --print-reply --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Previous
// Scale. add force-device param
spotify --force-device-scale-factor=1.5 %U
@blog
pprof
Generate reports in app with code:
CPU
cpuFile, err := os.Create("/tmp/cpuProfile.out")
if err != nil {
fmt.Println(err)
return
}
pprof.StartCPUProfile(cpuFile)
defer pprof.StopCPUProfile()
// CODE HERE
runtime.GC()
Memory
memory, err := os.Create("/tmp/memoryProfile.out")
if err != nil {
fmt.Println(err)
return
}
defer memory.Close()
// CODE HERE
err = pprof.WriteHeapProfile(memory)
if err != nil {
fmt.Println(err)
return
}
View reports with go tool pprof
go @blog
Mutex example
1.Without
package main
import "fmt"
var counter int = 0
func main() {
ch := make(chan bool)
for i := 1; i < 5; i++{
go work(i, ch)
}
for i := 1; i < 5; i++{
<-ch
}
fmt.Println("The End")
}
func work (number int, ch chan bool){
counter = 0
for k := 1; k <= 5; k++{
counter++
fmt.Println("Goroutine", number, "-", counter)
}
ch <- true
}
Output
Goroutine 3 - 1
Goroutine 3 - 2
Goroutine 3 - 3
Goroutine 3 - 4
Goroutine 3 - 5
Goroutine 2 - 1
Goroutine 2 - 6
Goroutine 2 - 7
Goroutine 2 - 8
Goroutine 2 - 9
Goroutine 1 - 1
Goroutine 1 - 10
Goroutine 1 - 11
Goroutine 1 - 12
Goroutine 1 - 13
Goroutine 4 - 1
Goroutine 4 - 14
Goroutine 4 - 15
Goroutine 4 - 16
Goroutine 4 - 17
The End
2. With
package main
import (
"fmt"
"sync"
)
var counter int = 0
func main() {
ch := make(chan bool)
var mutex sync.Mutex
for i := 1; i < 5; i++{
go work(i, ch, &mutex)
}
for i := 1; i < 5; i++{
<-ch
}
fmt.Println("The End")
}
func work (number int, ch chan bool, mutex *sync.Mutex){
mutex.Lock()
counter = 0
for k := 1; k <= 5; k++{
counter++
fmt.Println("Goroutine", number, "-", counter)
}
mutex.Unlock()
ch <- true
}
Output
Goroutine 1 - 1
Goroutine 1 - 2
Goroutine 1 - 3
Goroutine 1 - 4
Goroutine 1 - 5
Goroutine 4 - 1
Goroutine 4 - 2
Goroutine 4 - 3
Goroutine 4 - 4
Goroutine 4 - 5
Goroutine 3 - 1
Goroutine 3 - 2
Goroutine 3 - 3
Goroutine 3 - 4
Goroutine 3 - 5
Goroutine 2 - 1
Goroutine 2 - 2
Goroutine 2 - 3
Goroutine 2 - 4
Goroutine 2 - 5
The End
@blog
golang
Find and replace
Find: (:update\s.*)(_new)
Replace: $1
Given text:
foo:update example_new
foo:update word_new
foo:update also_new
Output:
foo:update example
foo:update word
foo:update also
@blog #regex
Bulk Export
SQL-Insert-Statements-Bulk-100per.sql.groovy
SEP = ", "
QUOTE = "\'"
NEWLINE = System.getProperty("line.separator")
KEYWORDS_LOWERCASE = com.intellij.database.util.DbSqlUtil.areKeywordsLowerCase(PROJECT)
KW_INSERT_INTO = KEYWORDS_LOWERCASE ? "insert into " : "INSERT INTO "
KW_VALUES = KEYWORDS_LOWERCASE ? "values" : "VALUES"
KW_NULL = KEYWORDS_LOWERCASE ? "null" : "NULL"
OUT.append(KW_INSERT_INTO)
if (TABLE == null) OUT.append("MY_TABLE")
else OUT.append(TABLE.getParent().getName()).append(".").append(TABLE.getName())
OUT.append(" (")
COLUMNS.eachWithIndex { column, idx ->
OUT.append(column.name()).append(idx != COLUMNS.size() - 1 ? SEP : "")
}
OUT.append(")").append(NEWLINE).append(KW_VALUES)
def record(columns, dataRow, close) {
OUT.append(NEWLINE).append("(")
columns.eachWithIndex { column, idx ->
def value = dataRow.value(column)
def skipQuote = value.toString().isNumber() || value == null
def stringValue = value != null ? FORMATTER.format(dataRow, column) : KW_NULL
if (DIALECT.getDbms().isMysql()) stringValue = stringValue.replace("\\", "\\\\")
OUT.append(skipQuote ? "": QUOTE).append(stringValue.replace(QUOTE, QUOTE + QUOTE))
.append(skipQuote ? "": QUOTE).append(idx != columns.size() - 1 ? SEP : "")
}
deliMeter = dataRow.last() || close ? ";" : ","
OUT.append(")").append(deliMeter)
}
count = 0
def createInsert(columns, dataRow) {
count++
if (count%100 == 0 && !dataRow.last()) {
record(columns, dataRow, true)
OUT.append(NEWLINE).append(KW_INSERT_INTO)
if (TABLE == null) OUT.append("MY_TABLE")
else OUT.append(TABLE.getParent().getName()).append(".").append(TABLE.getName())
OUT.append(" (")
COLUMNS.eachWithIndex { column, idx ->
OUT.append(column.name()).append(idx != COLUMNS.size() - 1 ? SEP : "")
}
OUT.append(")").append(NEWLINE).append(KW_VALUES)
return
}
record(columns, dataRow, false)
}
ROWS.each { row -> createInsert(COLUMNS, row) }
mysql #groovy @blog
KDE Dive In
Apps
PHS 2019.1.4
DGP 2019.2.6 custom JDK
DGP 2019.3 + plugin Choose Runtime + 8u212-linux-x64-b1596.1
latte launcher
subl ~/.config/kwinrc
[ModifierOnlyShortcuts]
Meta=org.kde.lattedock,/Latte,org.kde.LatteDock,activateLauncherMenu
OR
kwriteconfig5 --file ~/.config/kwinrc --group ModifierOnlyShortcuts --key Meta "org.kde.lattedock,/Latte,org.kde.LatteDock,activateLauncherMenu"
qdbus org.kde.KWin /KWin reconfigure
@blog #linux #kde
Dock station D3100
Fix slowing CPU
sudo nano /etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
Identifier "Intel Graphics"
Driver "Intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "TripleBuffer" "true"
Option "MigrationHeuristic" "greedy"
Option "Tiling" "true"
Option "Pageflip" "true"
Option "ExaNoComposite" "false"
Option "Tiling" "true"
Option "Pageflip" "true"
Option "VSync" "false"
EndSection