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Error: Can't set headers after they are sent to the client
...
The res object in Express is a subclass of Node.js's http.ServerResponse (read the http.js source). You are allowed to call res.setHeader(name, value) as often as you want until you call res.writeHead(statusCode). After writeHead, the headers are baked in and you can only call ...
Search and Replace with RegEx components in Atom editor
....*" button at the right side. Click it and now it's regex mode.
I find
(http.*)\{\.uri\}
and replace to
[$1]($1)
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How to make join queries using Sequelize on Node.js
...ing from two tables, but the result should be the same
Further reading:
http://docs.sequelizejs.com/en/latest/docs/associations/#one-to-one-associations
http://docs.sequelizejs.com/en/latest/docs/associations/#one-to-many-associations
http://docs.sequelizejs.com/en/latest/docs/models-usage/#eager...
Why and when to use Node.js? [duplicate]
...hronous callbacks for your I/O.
It gives you useful tools like creating a HTTP server, creating a TCP server, handling file I/O.
It's a low level highly performant platform for doing any kind of I/O without having to write the entire thing in C from scratch. And it scales very well due to the non-...
https URL with token parameter : how secure is it?
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I hadn't thought about the HTTP-referer problem, but the url link would redirect to the result page, it wouldn't be a proper page (no google analytics or other third party script).
– Flackou
Mar 13 '09 at 16:41
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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...
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...
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...
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...