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What Makes a Method Thread-safe? What are the rules?
...ly not. You can write a program with only a single local variable accessed from a single thread that is nevertheless not threadsafe:
https://stackoverflow.com/a/8883117/88656
Does that apply for static methods as well?
Absolutely not.
One answer, provided by @Cybis, was: "Local variables ...
Best way to clear a PHP array's values
...f you want something more powerful use unset since it also will clear $foo from the symbol table, if you need the array later on just instantiate it again.
unset($foo); // $foo is gone
$foo = array(); // $foo is here again
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How do I 'overwrite', rather than 'merge', a branch on another branch in Git?
...--strategy-option ours) is. Here's a small example to show the two results from using the strategy vs the strategy option. I also recommend reading the question and answers of (Git Merging) When to use 'ours' strategy, 'ours' option and 'theirs' option?
First, setup a repository with 2 branches and ...
How to overlay images
... Tim K.: your code looks fine, except for the CSS. The engine reads CSS from right to left. When you use 'a.gallerypic' it's looks first for 'gallerypic' and then it checks if 'gallerypic' has a 'a' ancestor. To solve this, simple leave the 'a' out, so you get '.gallerypic'. No need for the prece...
iTunes Connect: How to choose a good SKU?
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Sadly no input from other people. As I know, I can commit multiple version under the same SKU Number. Right? Because of that, it does not make sense for me having the version number is part of the SKU. Is it because they think people will c...
Is there any publicly accessible JSON data source to test with real world data? [closed]
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Getting an "over quota" error from their host. Guess everyone found out about it.
– Robert Oschler
Sep 12 '15 at 22:22
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Pandas dataframe get first row of each group
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suppose that counting from the top you want to get row number top_n, then dx = df.groupby('id').head(top_n).reset_index(drop=True) and suppose that counting from the bottom you want to get row number bottom_n, then dx = df.groupby('id').tail(bott...
How to prevent browser page caching in Rails
...gured this out - http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/ in application_controller.rb
After Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_headers
private
def set_cache_headers
response.headers[...
How to process POST data in Node.js?
How do you extract form data ( form[method="post"] ) and file uploads sent from the HTTP POST method in Node.js ?
28 Ans...
jQuery and AJAX response header
So I've got this jQuery AJAX call, and the response comes from the server in the form of a 302 redirect. I'd like to take this redirect and load it in an iframe, but when I try to view the header info with a javascript alert, it comes up null, even though firebug sees it correctly.
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