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Inject errors into already validated form?
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
Express.js - app.listen vs server.listen
...extend a bit Tim answer.
From official documentation:
The app returned by express() is in fact a JavaScript Function,
DESIGNED TO BE PASSED to Node’s HTTP servers as a callback to handle
requests.
This makes it easy to provide both HTTP and HTTPS versions of your
app with the sam...
What's the dSYM and how to use it? (iOS SDK)
...esn't hurt to include the app symbols (the dsym file) and send it to apple by checking the "include app symbols..." in the upload to App Store wizard
– Tomer Even
Jun 9 '16 at 5:17
...
Django CharField vs TextField
...storage — and text (or similar) types — those are usually limited only by hardcoded implementation limits (not a DB schema).
PostgreSQL 9, specifically, states that "There is no performance difference among these three types", but AFAIK there are some differences in e.g. MySQL, so this is somet...
What character encoding should I use for a HTTP header?
...
In short: Only ASCII is guaranteed to work. Some non-ASCII bytes are allowed for backwards compatibility, but are not supposed to be displayable.
HTTPbis gave up and specified that in the headers there is no useful encoding besides ASCII:
Historically, HTTP has allowed field con...
Loading Backbone and Underscore using RequireJS
...ts synchronously loaded with require, so jquery is guaranteed to be loaded by the time you try to use any $ plugins in any module. In this case, when you want to use $ plugins, you can just include them in your dependency list as if they were AMD, even if they're not. This is definitely an exceptio...
warning about too many open figures
... without complaining, but it would complain after 20 batches. I fixed that by using cla() after each plot, and close() after each batch.
from matplotlib import pyplot as plt, patches
import os
def main():
for i in range(21):
print('Batch {}'.format(i))
make_plots('figures')
...
Java enum - why use toString instead of name
...is not guaranteed:
MyEnum taco = MyEnum.valueOf(MyEnum.TACO.toString());
By the way, I find it very odd for the Javadoc to explicitly say "most programmers should". I find very little use-case in the toString of an enum, if people are using that for a "friendly name" that's clearly a poor use-case...
Java Synchronized Block for .class
...hread can be in this block.
With synchronized(this) the block is guarded by the instance. For every instance only one thread may enter the block.
synchronized(X.class) is used to make sure that there is exactly one Thread in the block. synchronized(this) ensures that there is exactly one thread p...
How persistent is localStorage?
...tring form in the regular browser cache.
Persistence
On disk until deleted by user (delete cache) or by the app
https://developers.google.com/web-toolkit/doc/latest/DevGuideHtml5Storage
As for a "replacement for the Cookie", not entirely
Cookies and local storage really serve difference purposes....