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Invalidating JSON Web Tokens
...or a new node.js project I'm working on, I'm thinking about switching over from a cookie based session approach (by this, I mean, storing an id to a key-value store containing user sessions in a user's browser) to a token-based session approach (no key-value store) using JSON Web Tokens (jwt).
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Git: How to return from 'detached HEAD' state
... this:
# you are currently in detached HEAD state
git checkout -b commits-from-detached-head
and then merge commits-from-detached-head into whatever branch you want, so you don't lose the commits.
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PHP parse/syntax errors; and how to solve them
...programming languages. It has rigid grammar rules, which it cannot recover from when encountering misplaced symbols or identifiers. It can't guess your coding intentions.
Most important tips
There are a few basic precautions you can always take:
Use proper code indentation, or adopt any lofty ...
Hash collision in git
...y Paradox" or "Birthday Problem", which states that when you pick randomly from a given set, you need surprisingly few picks before you are more likely than not to have picked something twice. But "surprisingly few" is a very relative term here.
Wikipedia has a table on the probability of Birthday P...
How to set text color to a text view programmatically [duplicate]
...;
Or if you have defined color code in resource's color.xml file than
(From API >= 23)
mTextView.setTextColor(ContextCompat.getColor(context, R.color.<name_of_color>));
(For API < 23)
mTextView.setTextColor(getResources().getColor(R.color.<name_of_color>));
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Should Javadoc comments be added to the implementation?
...y serves as a noise in the code. All sensible tools inherit method javadoc from the superclass or interface as specified here:
Inherit from classes and interfaces - Inheriting of comments occurs in all
three possible cases of inheritance from classes and interfaces:
- When a method in a class over...
How do I embed a single file from a GitHub gist with the new gist interface?
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Take the gist URL from the left-hand side and after the .js add a query string like ?file=myFile.blah, e.g.
<script src="https://gist.github.com/4505639.js?file=macroBuild.scala" type="text/javascript"></script>
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How can I nullify css property?
.... This keyword resets
the property to its inherited value if it inherits from its parent or
to its initial value if not. In other words, it behaves like the
inherit keyword in the first case and like the initial keyword in the
second case.
Browser support is good: http://caniuse.com/css-un...
How do you remove the title text from the Android ActionBar?
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When should I cal the methods? I mean from which method (activity, fragment) should it be called?
– ka3ak
Oct 13 '18 at 10:53
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CPU Privilege Rings: Why rings 1 and 2 aren't used?
...vice drivers at that level, so they are privileged, but somewhat separated from the rest of the kernel code.
Rings 1 and 2 are in a way, "mostly" privileged. They can access supervisor pages, but if they attempt to use a privileged instruction, they still GPF like ring 3 would. So it is not a bad p...