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How do popular apps authenticate user requests from their mobile app to their server?
...I imagine they use a "token" based security system, so the password is actually never stored anywhere, just used the first time to authenticate. So the app initially posts the username/password (over ssl) and the server returns a token that the app stores. For subsequent sync attempts the token is s...
What's the difference between deadlock and livelock?
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All the content and examples here are from
Operating Systems: Internals and Design Principles
William Stallings
8º Edition
Deadlock: A situation in which two or more processes are unable to proceed because each is waiting ...
Running multiple TeamCity Agents on the same computer?
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Yes, it's possible:
Several agents can be installed on a single machine. They function as separate agents and TeamCity works with them as different agents, not utilizing the fact that they share the same machine.
After installing one agent you can install additional one,...
What is the difference between SAX and DOM?
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+1 - to clarify: use a DOM parser with smaller files that fit in RAM. Use a SAX parser for large files that wont.
– Richard H
Jul 26 '11 at 10:46
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How to retrieve an element from a set without removing it?
...r(s)) only exceeds list(s)[0] by three characters and is otherwise dramatically superior in both time and space complexity. So, while the claim of "least code" is trivially true, it's also trivially true that this is the worst possible approach. Even manually removing and then re-adding the removed ...
What's “tools:context” in Android layout files?
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That attribute is basically the persistence for the "Associated Activity" selection above the layout. At runtime, a layout is always associated with an activity. It can of course be associated with more than one, but at least one. In the tool, we ...
Using Kafka as a (CQRS) Eventstore. Good idea?
...an event store however to quote their intro:
The Kafka cluster retains all published messages—whether or not they
have been consumed—for a configurable period of time. For example if
the retention is set for two days, then for the two days after a
message is published it is available f...
H2 in-memory database. Table not found
...e tables with UPPERCASE names then behaving case-sensitive, even though in all scripts (including in the creation ones) i used lowercase.
Solved by adding ;DATABASE_TO_UPPER=false to the connection URL.
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How to write an async method with out parameter?
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@orad I especially like this: private async Task<(bool success, Job job, string message)> TryGetJobAsync(...)
– J. Andrew Laughlin
Oct 26 '18 at 15:26
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Eclipse Android and gitignore
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What I usually add to .gitignore is:
bin
gen
bin and gen are constantly changed while coding, so there's no need to include them into the Git repository. Also, sometimes I add .classpath and .project which are Eclipse specific files...