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How do you find all subclasses of a given class in Java?
...ava Reflections API.
A project exists that does the necessary scanning and indexing of your classpath so you can get access this information...
Reflections
A Java runtime metadata analysis, in the spirit of Scannotations
Reflections scans your classpath, indexes the metadata, allows you to query it...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
... get one thing out of the way first. The explanation that yield from g is equivalent to for v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warrant adding yield from to the lang...
How to get the last N rows of a pandas DataFrame?
I have pandas dataframe df1 and df2 (df1 is vanila dataframe, df2 is indexed by 'STK_ID' & 'RPT_Date') :
3 Answers
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How do I auto-reload a Chrome extension I'm developing?
...lution only worked if I wrote chrome.runtime.reload() in the script in the index.html where is specified in the manifest file in the follow way: ** "background": { "page": "index.html", ** . In my content_script js file, I couldn't access this function. I believe, it is for security reseons.
...
What is the idiomatic Go equivalent of C's ternary operator?
...lown var+if+else block of code, though, this spelling is also used often:
index := val
if val <= 0 {
index = -val
}
and if you have a block of code that is repetitive enough, such as the equivalent of int value = a <= b ? a : b, you can create a function to hold it:
func min(a, b int) ...
Extract first item of each sublist
...hon includes a function called itemgetter to return the item at a specific index in a list:
from operator import itemgetter
Pass the itemgetter() function the index of the item you want to retrieve. To retrieve the first item, you would use itemgetter(0). The important thing to understand is th...
How do I make an html link look like a button?
... This was dropped from the CSS3 spec. htmlvalidator.com/help.php?m=1&h=appearance
– user1431356
May 8 '18 at 23:37
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“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
...d to maybe add a HEADER in your called script, here is what I had to do in PHP:
header('Access-Control-Allow-Origin: *');
More details in Cross domain AJAX ou services WEB (in French).
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How big can a user agent string get?
...ind the fastest hash algorithm that didn't produce any collisions. For my PHP environment I found md5 performed quickly at 2.3 seconds with no collisions. Interestingly I tried crc32 and crc32b and they also performed at 2.3 seconds with no collisions. But, because md5 has more combinations than c...
What are the differences between JSON and JSONP?
...and increase your audience."
},
{
"siteName": "PHPSCRIPTS4U",
"domainName": "http://www.phpscripts4u.com",
"description": "The Blog of Enthusiastic PHP Scripters"
}
]
});
(function($) {
var url = 'http://www.jquery4u.com/scripts/jquery...