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Inserting HTML elements with JavaScript
Instead of tediously search for workarounds for each type of attribute and event when using the following syntax:
7 Answers...
How do I read any request header in PHP
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// Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_')
$headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX'];
ELSE IF: you run PHP as an Apache module or, as of PHP 5.4, using FastCGI (simple method):
apache_request_headers()
<?php
$headers = apa...
What do helper and helper_method do?
... This is used for any method that you need to access from both controllers and helpers/views (standard helper methods are not available in controllers). e.g. common use case:
#application_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :curre...
What is an invariant?
... of a program state that is always true..." - @jacob baskin - well written and thanks for this.
– twknab
May 31 '19 at 23:37
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How to find a deleted file in the project commit history?
...ch touched that file. Then, you can find the version of the file you want, and display it with...
git show <SHA> -- <path-to-file>
Or restore it into your working copy with:
git checkout <SHA>^ -- <path-to-file>
Note the caret symbol (^), which gets the checkout prior to...
Splitting a Java String by the pipe symbol using split(“|”)
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You need
test.split("\\|");
split uses regular expression and in regex | is a metacharacter representing the OR operator. You need to escape that character using \ (written in String as "\\" since \ is also a metacharacter in String literals and require another \ to escape it).
You...
Do I need Content-Type: application/octet-stream for file download?
The HTTP standard says:
1 Answer
1
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Looking to understand the iOS UIViewController lifecycle
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All these commands are called automatically at the appropriate times by iOS when you load/present/hide the view controller. It's important to note that these methods are attached to UIViewController and not to UIViews themselves. You won't...
In HTML5, is the localStorage object isolated per page/domain?
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It's per domain and port (the same segregation rules as the same origin policy), to make it per-page you'd have to use a key based on the location, or some other approach.
You don't need a prefix, use one if you need it though. Also, yes,...
Exception thrown in catch and finally clause
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Based on reading your answer and seeing how you likely came up with it, I believe you think an "exception-in-progress" has "precedence". Keep in mind:
When an new exception is thrown in a catch block or finally block that will propagate out of that blo...