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How to parse Excel (XLS) file in Javascript/HTML5
...rmat) data to JSON. you can add promise to the function.
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/jszip.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.js"></script>
<script>
var ExcelToJSON = function() {
thi...
How can I set a website image that will show as preview on Facebook?
... Graph XML namespace extension to your HTML declaration
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:fb="http://ogp.me/ns/fb#">
2. Inside your <head></head> use the following meta tag to define the image you want to use
<meta property="og:image" content="fully_qu...
Set default CRAN mirror permanent in R
...a CRAN mirror
# local({r <- getOption("repos")
# r["CRAN"] <- "http://my.local.cran"
# options(repos=r)})
So remove the comment marks and change "http://my.local.cran" to the correct website, e.g.:
local({r <- getOption("repos")
r["CRAN"] <- "http://cran.r-project.o...
Assign width to half available screen width declaratively
...8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_p...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的，但是出于效率的考虑，推荐安装LuaJIT。
shell> wget http://luajit.org/download/LuaJIT-<VERSION>.tar.gz
shell> tar zxvf LuaJIT-<VERSION>.tar.gz
shell> cd LuaJIT-<VERSION>
shell> make
shell> make install
因为安装在缺省路径，所以LuaJIT对应的lib，include均在/u...
How can I convert an image into Base64 string using JavaScript?
...u can choose from:
1. Approach: FileReader
Load the image as blob via XMLHttpRequest and use the FileReader API to convert it to a dataURL:
function toDataURL(url, callback) {
var xhr = new XMLHttpRequest();
xhr.onload = function() {
var reader = new FileReader();
reader.onloa...
Input with display:block is not a block, why not?
...ing and/or borders.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>Cross-browser CSS box-sizing:border-box</title...
How to delete or add column in SQLITE?
... actually wrote about it on my blog, you can see more explanations there:
http://udinic.wordpress.com/2012/05/09/sqlite-drop-column-support/
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How to get jQuery dropdown value onchange event
...option value="">Go to page...</option>
<option value="http://css-tricks.com/">CSS-Tricks</option>
<option value="http://digwp.com/">Digging Into WordPress</option>
<option value="http://quotesondesign.com/">Quotes on Design</option...
JavaScript URL Decode function
...
Here's what I used:
In JavaScript:
var url = "http://www.mynewsfeed.com/articles/index.php?id=17";
var encoded_url = encodeURIComponent(url);
var decoded_url = decodeURIComponent(encoded_url);
In PHP:
$url = "http://www.mynewsfeed.com/articles/index.php?id=17";
$enco...