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Why does Google prepend while(1); to their JSON responses?
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It prevents JSON hijacking, a major JSON security issue that is formally fixed in all major browsers since 2011 with ECMAScript 5.
Contrived example: say Google has a URL like mail.google.com/json?action=inbox which returns the first 50 messages of your inbox in JSON format...
Can someone explain the traverse function in Haskell?
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traverse is the same as fmap, except that it also allows you to run effects while you're rebuilding the data structure.
Take a look at the example from the Data.Traversable documentation.
data Tree a = Empty | Leaf a | Node (Tree a...
Scala 2.8 breakOut
In Scala 2.8 , there is an object in scala.collection.package.scala :
4 Answers
4
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What is the use of join() in Python threading?
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A somewhat clumsy ascii-art to demonstrate the mechanism:
The join() is presumably called by the main-thread. It could also be called by another thread, but would needlessly complicate the diagram.
join-calling should be placed in the track of the main-thread, but to express t...
Check if element exists in jQuery [duplicate]
How do I check if an element exists if the element is created by .append() method?
$('elemId').length doesn't work for me.
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What are the differences between the urllib, urllib2, urllib3 and requests module?
... and highly capable, that's how I used to think. But the requests package is so unbelievably useful and short that everyone should be using it.
First, it supports a fully restful API, and is as easy as:
import requests
resp = requests.get('http://www.mywebsite.com/user')
resp = requests.post('ht...
How do I check if a directory exists? “is_dir”, “file_exists” or both?
I want to create a directory if it does'nt exist already.
12 Answers
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Timer function to provide time in nano seconds using C++
I wish to calculate the time it took for an API to return a value.
The time taken for such an action is in the space of nano seconds. As the API is a C++ class/function, I am using the timer.h to caculate the same:
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How are software license keys generated?
...e keys are the defacto-standard as an anti-piracy measure. To be honest, this strikes me as (in)Security Through Obscurity , although I really have no idea how license keys are generated. What is a good (secure) example of license key generation? What cryptographic primitive (if any) are they using...
How to check if an object is a certain type
...using a different object each time. For example, in one case I am using a ListView and in another case I am passing a DropDownList.
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