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MongoDB relationships: embed or reference?
...n I rote this in 2011 twitter was still tied to text messages and Ruby 1.4 strings; in other words still ASCII chars only.
– John F. Miller
Sep 8 '17 at 18:52
...
What is the http-header “X-XSS-Protection”?
...;script src="framebuster.js" and the browser will automatically remove the string <script src="framebuster.js" from the actual page source. Note that the rest of the page continues run and the attacker just removed this part of page security. In practice, any JS in the page source can be modified...
Should private helper methods be static if they can be static
...ate static void doSomethingStatic(int arg) { }
public static void main(String[] args) {
// do it twice both ways
doSomethingStatic(0);
doSomethingStatic(0);
TestBytecodeSize t = new TestBytecodeSize();
t.doSomething(0);
t.doSomething(0);
}
}
...
How to “pretty” format JSON output in Ruby on Rails
...nController::Renderers.add :json do |json, options|
unless json.kind_of?(String)
json = json.as_json(options) if json.respond_to?(:as_json)
json = JSON.pretty_generate(json, options)
end
if options[:callback].present?
self.content_type ||= Mime::JS
"#{options[:callback]}(#{jso...
How to check sbt version?
...t project to jacek (in build file:/Users/jacek/)
[info] Setting: java.lang.String = 0.13.1
[info] Description:
[info] Provides the version of sbt. This setting should be not be modified.
[info] Provided by:
[info] */*:sbtVersion
[info] Defined at:
[info] (sbt.Defaults) Defaults.scala:68
[info] D...
Immutable vs Unmodifiable collection
...ects themselves may still be mutable - creating an immutable collection of StringBuilder doesn't somehow "freeze" those objects.
Basically, the difference is about whether other code may be able to change the collection behind your back.
...
Javascript Shorthand for getElementById
...
To save an extra character you could pollute the String prototype like this:
pollutePrototype(String, '绎', {
configurable: false, // others must fail
get: function() {
return document.getElementById(this);
},
set: function(element) {
eleme...
subtle differences between JavaScript and Lua [closed]
...als in JS can be in octal.
JS has explicit Unicode support, and internally strings are encoded in UTF-16 (so they are sequences of pairs of bytes). Various built-in JavaScript functions use Unicode data, such as "pâté".toUpperCase() ("PÂTÉ"). Lua 5.3 and up have Unicode code point escape sequenc...
jQuery .data() does not work, but .attr() does
...ia .data() will return an Object while retrieval via .attr() will return a string. See jsfiddle example.
Since .data() does extra processing jQuery stores the results of attribute evaluation in $.cache - after all, once a data attribute has been evaluated it would be wasteful to re-evaluate on ever...
Understanding Python's “is” operator
...
Another duplicate was asking why two equal strings are generally not identical, which isn't really answered here:
>>> x = 'a'
>>> x += 'bc'
>>> y = 'abc'
>>> x == y
True
>>> x is y
False
So, why aren't they the same str...