junjizhi

prepare1:
        if [ ! -e $(LINUX_TAR_NAME) ] ; \
        then \
                wget $(LINUX_TAR_SITE) ; \
        fi;
        tar -xf $(LINUX_TAR_NAME) && \

junjizhi

#delete files or dirs whose name does not end with '.sh' in the current path
ls | grep -v '\.sh$' | xargs rm -r

#However, this way does not solve the problem that the path names that have spaces, for example, "cmp\ output"

#more robust version
#from http://stackoverflow.com/questions/4702577/need-a-shell-script-that-deletes-all-files-except-pdf
find . -maxdepth 1 -type f ! -iname '*.pdf' -delete

#if we need to delete the directories, too, then remove '-type f'

junjizhi

if [ -e $DIR1 ] && [ -e $DIR2 ] || [ -e $DIR3 ] 
then 
  echo "do sth"
fi

junjizhi

NUM=$1

#equel to for (int i=1; i<num; i++) in c/c++, java
for i in $(seq 1 $NUM);
do 
  echo $i
done

junjizhi

0xFe1Bab4f773e3159721d1bFce550cf1217a22e2E

junjizhi

(defun jz/copy-word
    (&optional
     arg
     )
  "Copy words at point into kill-ring.
  
  Adapted from https://www.emacswiki.org/emacs/CopyWithoutSelection#toc4
  
  The original implementation doesn't work if the cursor is at the beginning of current word. It copies one word back instead. 
  With this tweak, this function works in that case, but won't work if the current cursor is at the end of current word.

junjizhi

on run {input, parameters}
	set _Date to short date string of (current date)
	set _DividerLine to "-----------------------------------------------------------------------------------------------"
	
	set clipboard_contents to (the clipboard)
    set the clipboard to _Date & return & _DividerLine & return
    tell application "System Events" to keystroke "v" using command down
    delay 0.2 -- needed because otherwise the next command can run before the paste occurs
    set the clipboard to clipboard_contents
end run

junjizhi

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Clickable Card',

junjizhi

// This is a pseudo code to show the overall structure 
// of a main page of a shopping cart app built with Flutter.
// For the complete app, please see https://github.com/junjizhi/flutter-shopping-cart

Widget build(BuildContext context) {
  var bloc = Provider.of<CartBloc>(context);
  int totalCount = 0;
    if (bloc.cart.length > 0) {
      totalCount = bloc.cart.values.reduce((a, b) => a + b);
  }

junjizhi

// https://github.com/junjizhi/flutter-shopping-cart

class CartPage extends StatelessWidget {
  CartPage({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    var bloc = Provider.of<CartBloc>(context);
    var cart = bloc.cart;
    return Scaffold(