We need to install PyMuPDF which is a Python binding with support for MuPDF (current version 1.19.*), a lightweight PDF toolkit before our work. pip3 install –upgrade pip pip3 install –upgrade pymupdf Write python script for saving PDF page to image. import sys, fitz # import the bindings if __name__ Read more…
Somtimes the user’s browser is not the newest version. It may not support WebAssembly or a few functions. So we have to test it before using. Is WebAssembly Supported? Import a WebAssembly module and create an instance of it. Track this process to see if any problems arise. <!doctype html> Read more…
Create a small program by computer language C, it print primers in range (1, 6000). Let’s compile it by emcc and generate a template html file. #include <stdio.h> const int N = 6000; int primer[N],count; char visit[N] = { 0 }; void GetPrimers() { count = 0; for (int i Read more…
Here is a demo for showing tips when users input keys on an HTML page. Result:
Inspiration: the famous fork bomb in the Linux world.Fork bomb::(){:|:&};. It’s like a crazy binary tree that consumes the resources of the system constantly. Fork bomb has an impact size of . The script here can’t do that terrible damage. Keep the size , use curl to access the target Read more…
Here is a bash script helps you to rename files *.c.gz to new files *.c. Code snippet: #! /bin/bash cmd1=$(ls |grep c.gz) cmd2=$(ls |grep c.gz |sed ‘s/\.gz//g’) array1=() len1=0 for i in $cmd1; do array1[$len1]=$i len1=$(expr $len1 + 1) done array2=() len2=0 for i in $cmd2; do array2[$len2]=$i len2=$(expr $len2 Read more…
Here is a convex object and an origin point outside it. is an arbitrary point in the boundary. Find the farthest point on the boundary along the vector . Name the farthest point . We get a new vector to find the farthest point on the boundary along the direction Read more…
Do kegel exercises for 10 minutes a day, improve pelvic muscles, treat urinary incontinence, improve sexual satisfaction and help reduce premature ejaculation.
The post introduces how to create an environment for learning VTK by Python. The basic conditions on my computer: VTK-8.1.1 macOS Mojave 10.14 Python 2.7.10 Write a bash script and run it. cmake ./ -G “Unix Makefiles” \ -DVTK_USE_QVTK:BOOL=ON \ -DCMAKE_INSTALL_PREFIX=/usr/local \ -DVTK_USE_GUISUPPORT:BOOL=ON \ -DVTK_QT_VERSION=5 \ -DModule_vtkGUISupportQt:BOOL=ON \ -DModule_vtkGUISupportQtOpenGL:BOOL=ON \ Read more…