var myArr = [];
var i = 0;
while(i < 5) {
myArr.push(i);
i++;
}
For Loops
var myArr = [];
// for ([initialization]; [condition]; [final-expression])
for (var i = 0; i < 5; i++) {
myArr.push(i);
}
Iterate through an Array with a For Loop
var myArr = [ 2, 3, 4, 5, 6];
var total = 0;
for (var i = 0; i < myArr.length; i++) {
total += myArr[i];
}
Nesting For Loops
var myArr = [
[1,2], [3,4], [5,6]
];
for (var i=0; i < myArr.length; i++) {
for (var j=0; j < myArr[i].length; j++) {
console.log(myArr[i][j]);
}
}
For…In Loops
Iterate through all the keys within an object.
let users = {
Max: {
age: 27
},
Mira: {
age: 32
},
Rich: {
age: 48
}
};
for (let user in users) {
console.log(user); // logs: Max, Mira, Rich
if (users[user].age > 40) {
console.log(`${user} is old.`);
}
}
Do…While Loops
A do...while loop ensures that the code inside the loop will run at least once.
var myArr = [];
var i = 0;
do {
myArr.push(i);
i++;
} while (i < 5);
Replace Loops using Recursion
/* For Loop */
function multiply(arr, n) {
var product = 1;
for (var i = 0; i < n; i++) {
product *= arr[i];
}
return product;
}
/* Replace For Loop with Recursion */
function multiply(arr, n) {
if (n <= 0) {
return 1;
} else {
return multiply(arr, n - 1) * arr[n - 1];
}
}
Note: Recursive functions must have a base case when they return without calling the function again (in this example, when n <= 0), otherwise they can never finish executing.
/* Count to n */
function countup(n) {
if (n < 1) {
return [];
} else {
const countArray = countup(n - 1);
countArray.push(n);
return countArray;
}
}
console.log(countup(5)); // [ 1, 2, 3, 4, 5 ]
Note: The push happens last, after the recursive call has returned. Thats why the value of ndecreases, but the values in the final array are increasing.
/* Create a Range of Numbers */
function rangeOfNumbers(startNum, endNum) {
if (startNum == endNum) {
return [startNum];
} else if (startNum < endNum) {
const rangeArray = rangeOfNumbers(startNum + 1, endNum);
rangeArray.unshift(startNum);
return rangeArray;
}
};
console.log(rangeOfNumbers(5, 10)); // [ 5, 6, 7, 8, 9, 10 ]
/* Basic Function */
function reusableFunction() {
console.log("Hello World");
}
reusableFunction();
/* Passing Values to Functions with Arguments */
function functionWithArgs(arg1, arg2 ) {
console.log(arg1 + arg2);
}
functionWithArgs(1, 2); //returns 3
/* Global vs. Local Scope in Functions
It is possible to have both local and global variables with the same name.
When you do this, the local variable takes precedence over the global variable. */
var outerWear = "T-Shirt";
function myOutfit() {
var outerWear = "sweater"
return outerWear;
}
myOutfit(); //returns "sweater"
/* Escape Sequences in Strings
Code Output
\' single quote
\" double quote
\\ backslash
\n newline
\r carriage return
\t tab
\b word boundary
\f form feed */
var firstStr = 'I come first. '
var secondStr = 'I come second.'
/* Concatenating Strings with Plus Operator */
var myStr = firstStr + secondStr;
/* Concatenating Strings with the Plus Equals Operator */
var myStr = firstStr;
myStr += secondStr;
/* Bracket Notation to Find the First Character */
var firstName = "Carlos";
var firstLetter = firstName[0]; // firstLetter is "C"
var firstName[0] = "K"; // not possible! Individual characters of a string literal cannot be changed.
/* Bracket Notation to Find the Last Character in a String */
var firstName = "Carlos";
var lastLetter = firstName[firstName.length - 1]; // lastLetter is "s"
/* Split a string into an array of substrings */
var str = "How are you doing today?";
var res = str.split(" "); // [ 'How', 'are', 'you', 'doing', 'today?' ]
var otherString = "How9are7you2today";
var byDigits = otherString.split(/\d/); // ["How", "are", "you", "today"]
/* Array of strings to single string */
var stringArray = [ 'How', 'are', 'you', 'doing', 'today?' ];
var str = stringArray.join(" "); // "How are you doing today?"
/* Check if a string ends with "universe." */
var str = "Hello world, welcome to the universe.";
var n = str.endsWith("universe.");
/* Lower & Upper Case */
console.log('ALPHABET'.toLowerCase()); // 'alphabet'
console.log('alphabet'.toUpperCase()); // 'ALPHABET'
console.log('test'.charAt(0).toUpperCase() + 'test'.slice(1)); // Test
/* reverse String */
let str = "test";
let reverseStr = str.split("").reverse().join(""); // tset
mkdir ~/.npm-global
npm config set prefix '~/.npm-global'
mkdir ~/.npm-global/lib
#add the following line to your .bashrc or .profile or .zshrc
export PATH=~/.npm-global/bin:$PATH
Step 1: Provide an OData V4 service
git clone https://github.com/sap-samples/cloud-cap-samples remote-odata-service
cd remote-odata-service
npm i
npm i -g @sap/cds-dk
cds watch fiori
Step 2: Generate a SAP Fiori elements List Report Object Page (LROP) app with Fiori tools
1. Open VSC, press Ctrl + P and search for > Fiori: Open Application Generator
2. Choose SAP Fiori elements application In my case there was no default generator, so first I had to install it.
3. Select List Report Object Page 4. Select Connect to an OData Service as Data source and enter as URL http://localhost:4004/browse 5. Choose Books as the Main entity and texts as Navigation entity 6. Complete the mandatory information module name (e.g. bookshop) and Project folder path for storing your app. Of course, you can also fill in the optional information.
Step 3: Make changes in package.json and ui5.yaml required for using OpenUI5
specVersion: '2.2'
metadata:
name: 'fiorielements_openui5'
type: application
framework:
name: OpenUI5
version: "1.85.0"
libraries:
- name: sap.m
- name: sap.ui.core
- name: sap.uxap
- name: themelib_sap_fiori_3
server:
customMiddleware:
- name: fiori-tools-proxy
afterMiddleware: compression
configuration:
ignoreCertError: false # If set to true, certificate errors will be ignored. E.g. self-signed certificates will be accepted
backend:
- path: /browse
url: http://localhost:4004
- name: fiori-tools-appreload
afterMiddleware: compression
configuration:
port: 35729
path: webapp
Step 4: Run the V4 application
cd ~/projects/fiorielements_openui5
npm i
npm start
Now http://localhost:8080/index.html should be opened in your browser. “Note: Clicking on the Go button in List Report application might request user and password. Please enter user alice, no password.” Finally I got my list items.
After pulling the latest Nextcloud image I got some warnings about missing indices, missing primary keys and about converting some column types to big int. The warnings could easily be fixed by running the suggested occ comands. Append “-no-interaction” to suppress the confirmation question (see docs).
sudo micro /etc/default/grub
# if not already set, update
GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=5
sudo update-grub
Create new shortcut for the “System Monitor”
Copying my dotfiles over. First the .aliases
alias ll='ls -Al --color=auto --block-size=MB --group-directories-first'
alias ls='ls -l --color=auto --block-size=MB --group-directories-first'
alias cp='cp -vRi'
alias rm='rm -vRi'
alias mv='mv -vi'
alias ln='ln -v'
alias mkdir='mkdir -pv' # Creates parent directories if needed
alias chown='chown -v'
alias chmod='chmod -v'
alias rmdir='rmdir -v'
alias ps='ps -f'
#alias tar='tar -xvf' #made some problems
alias df='df -Th'
alias lsd='lsd -Al --group-dirs first'
alias jobs='jobs -lr'
alias sudo='sudo ' #Allows for aliases to work with sudo.
alias pls='sudo $(history -p !!)'
alias wget='wget -qc --show-progress' #Download with WGet with pretty and useful features.
alias grep='grep -sI --color=auto' #Colorful (auto) 'grep' output.
alias psf='ps -faxc -U $UID -o pid,uid,gid,pcpu,pmem,stat,comm' #Less excessive, current-user-focused ps alternative.
alias klog="sudo dmesg -t -L=never -l emerg,alert,crit,err,warn --human --nopager" #Potentially useful option for viewing the kernel log.
alias lsblk='lsblk -o name,label,fstype,size,type,uuid'
alias ping='ping -c 5' # Stop after sending 5 pings
# Docker
alias dpsa='docker ps -a --format "table{{.ID}}\t{{.Names}}\t{{.Image}}\t{{.Ports}}\t{{.Status}}"'
# Find commands I type often so I can alias them
# https://www.jakeworth.com/alias-terminal-commands/
alias typeless='history n 20000 | sed "s/.* //" | sort | uniq -c | sort -g | tail -n 100'
# Micro Editor
alias mic='micro'
alias nano='micro'
# Make mount command output pretty and readable
alias mnt='mount | column -t'
# jump to my download directory
alias dl='cd "$HOME"/Downloads'
# Youtube-dl
alias dlvid='youtube-dl --add-metadata --embed-thumbnail'
alias dlmp3='youtube-dl -x --audio-format mp3 --add-metadata --embed-thumbnail'
alias dlbest='youtube-dl -f bestvideo+bestaudio'
# Git
alias git add .='git aa'
alias git commit -m='git cm'
# mkdir && cd
function mcd() {
mkdir -p $1
cd $1
}
# Archive extraction
# usage: ex <file>
ex ()
{
if [ -f "$1" ] ; then
case $1 in
*.tar.bz2) tar xjf $1 ;;
*.tar.gz) tar xzf $1 ;;
*.bz2) bunzip2 $1 ;;
*.rar) unrar x $1 ;;
*.gz) gunzip $1 ;;
*.tar) tar xf $1 ;;
*.tbz2) tar xjf $1 ;;
*.tgz) tar xzf $1 ;;
*.zip) unzip $1 ;;
*.Z) uncompress $1;;
*.7z) 7z x $1 ;;
*.deb) ar x $1 ;;
*.tar.xz) tar xf $1 ;;
*.tar.zst) unzstd $1 ;;
*) echo "'$1' cannot be extracted via ex()" ;;
esac
else
echo "'$1' is not a valid file"
fi
}
# navigation
up () {
local d=""
local limit="$1"
# Default to limit of 1
if [ -z "$limit" ] || [ "$limit" -le 0 ]; then
limit=1
fi
for ((i=1;i<=limit;i++)); do
d="../$d"
done
# perform cd. Show error if cd fails
if ! cd "$d"; then
echo "Couldn't go up $limit dirs.";
fi
}
Followed by my .zshrc
neofetch | lolcat
# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes
# ZSH_THEME="robbyrussell"
ZSH_THEME=powerlevel10k/powerlevel10k
# zsh-syntax-highlighting has to be the last plugin!
plugins=(git tmux zsh-autosuggestions zsh-syntax-highlighting)
# Preferred editor for local and remote sessions
if [[ -n $SSH_CONNECTION ]]; then
export EDITOR='micro'
else
export EDITOR='nano'
fi
# To customize prompt, run `p10k configure` or edit ~/.p10k.zsh.
[[ ! -f ~/.p10k.zsh ]] || source ~/.p10k.zsh
source $ZSH/oh-my-zsh.sh
if [ -f ~/.aliases ]; then
. ~/.aliases
fi
eval $(thefuck --alias FUCK)
DATA: l_p0001 TYPE p0001,
l_return TYPE bapireturn1.
"...
DATA(l_guid) = cl_system_uuid=>create_uuid_c32_static( ).
EXPORT p0001 = l_p0001 TO MEMORY ID l_guid.
SUBMIT z_hr_report WITH p_guid = l_guid AND RETURN.
IMPORT return = l_return FROM MEMORY ID l_guid.
Importing:
REPORT z_hr_report.
PARAMETERS p_guid TYPE sysuuid_c32.
DATA: l_p0001 TYPE p0001,
l_return TYPE bapireturn1.
START-OF-SELECTION.
IMPORT p0001 = l_p0001 FROM MEMORY ID p_guid.
CHECK sy-subrc = 0.
"do stuff...
CALL FUNCTION 'BAPI_EMPLOYEE_ENQUEUE'
EXPORTING
number = l_p0001-pernr
IMPORTING
return = l_return.
IF l_return-type = 'E'.
EXPORT return = l_return TO MEMORY ID p_guid.
RETURN.
ENDIF.
onInit: function () {
this._oModel = this.getOwnerComponent().getModel();
},
onButtonPress: function (oEvent) {
//get Data
var sPath = oEvent.getSource().getBindingContext().sPath;
var oData = this.getView().getModel().getObject(sPath);
var that = this;
//busy on
this._busyDialog = new sap.m.BusyDialog({});
this._busyDialog.open();
//create
this._oModel.create("/DataSet", oData, {
success: function (oData) {
that._busyDialog.close();
sap.m.MessageToast.show(that.getResourceBundle().getText("ok"));
},
error: function (oError) {
that._busyDialog.close();
sap.m.MessageToast.show(that.getResourceBundle().getText("nok"));
}
});
},
