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Understanding recursion [closed]
...A binary tree is a tree made of nodes that have exactly two children, typically called "left" and "right"; again the children can be nodes, or null. A root is a node that is not the child of any other node.
Imagine that a node, in addition to its children, has a value, a number, and imagine that we...
One line if-condition-assignment
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I don't think this is possible in Python, since what you're actually trying to do probably gets expanded to something like this:
num1 = 20 if someBoolValue else num1
If you exclude else num1, you'll receive a syntax error since I'm quite sure that the assignment must actually return so...
PHP session lost after redirect
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First, carry out these usual checks:
Make sure session_start(); is called before any sessions are being called. So a safe bet would be to put it at the beginning of your page, immediately after the opening <?php declaration before anything else. Also ensure there are no whitespaces/tabs be...
What do < and > stand for?
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Others have noted the correct answer, but have not clearly explained the all-important reason:
why do we need this?
What do < and > stand for?
&lt; stands for the < sign. Just remember: lt == less than
&gt; stands for the > Just remember: gt == greater than
Why can’t we...
Decoding and verifying JWT token using System.IdentityModel.Tokens.Jwt
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Within the package there is a class called JwtSecurityTokenHandler which derives from System.IdentityModel.Tokens.SecurityTokenHandler. In WIF this is the core class for deserialising and serialising security tokens.
The class has a ReadToken(String) method tha...
How to delete migration files in Rails 3
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I usually:
Perform a rake db:migrate VERSION=XXX on all environments, to the version before the one I want to delete.
Delete the migration file manually.
If there are pending migrations (i.e., the migration I removed was not the...
gcc warning" 'will be initialized after'
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The order of initialization doesn’t matter. All fields are initialized in the order of their definition in their class/struct. But if the order in initialization list is different gcc/g++ generate this warning. Only change the initialization order to avoid this warnin...
Microsoft.Office.Core Reference Missing
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.NET->Office (if PIA installed). See Spike's answer below.
– samis
Dec 30 '14 at 21:34
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How to parse JSON to receive a Date object in JavaScript?
...ates. You should do what @jAndy suggested and not serialize a DateTime at all; just send an RFC 1123 date string ToString("r") or a seconds-from-Unix-epoch number, or something else that you can use in the JavaScript to construct a Date.
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How does delete[] know it's an array?
Alright, I think we all agree that what happens with the following code is undefined, depending on what is passed,
16 Answe...