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What are OLTP and OLAP. What is the difference between them?
... It involves Queries accessing individual record like Update your Email in Company database.
OLAP (On-line Analytical Processing) deals with Historical Data or Archival Data. OLAP is characterized by relatively low volume of transactions. Queries are often very complex and involve aggregations. For ...
Test for existence of nested JavaScript object key
...9-10-17:
The optional chaining proposal reached Stage 3 on the ECMAScript committee process, this will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const value = obj?.level1?.level2?.level3
If any of the levels accessed is null ...
When NOT to use Cassandra?
...almost the same kind of solutions oriented toward ACID properties. When it comes to NoSQL, the decision becomes difficult because every NoSQL database offers different solutions and you have to understand which one is best suited for your app/system requirements. For example, MongoDB is fit for use...
Simple way to encode a string according to a password?
...asual observer, and you aren't looking to use third party libraries. I'd recommend something like the Vigenere cipher. It is one of the strongest of the simple ancient ciphers.
Vigenère cipher
It's quick and easy to implement. Something like:
import base64
def encode(key, string):
encoded_c...
What are the pros and cons of the SVN plugins for Eclipse, Subclipse and Subversive? [closed]
...g the history of a branch instead of just seeing a bunch of rows for every commit it can group commits by today, week, etc.
Mapping of trunk, branches, and tags
Subversive assumes the default svn layout: trunk, branches, tags (which you can change), so whenever you want to tag or branch it is one ...
What is the difference between memmove and memcpy?
...ot pass the same address as input and output. Read more here stackoverflow.com/questions/776283/…
– DanielHsH
Jan 1 '15 at 10:46
10
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WatiN or Selenium? [closed]
...ng some automated tests of our presentation soon. It seems that everyone recommends WatiN and Selenium . Which do you prefer for automated testing of ASP.NET web forms? Which of these products work better for you?
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In Python, how do I indicate I'm overriding a method?
In Java, for example, the @Override annotation not only provides compile-time checking of an override but makes for excellent self-documenting code.
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jQuery.parseJSON throws “Invalid JSON” error due to escaped single quote in JSON
... break;
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At the top of the method is an informative comment:
The formal JSON format does not allow strings in single quotes, but an implementation is allowed to accept them.
So some implementations will accept single quotes - but you should not rely on this. Many popular...
Solution to INSTALL_FAILED_INSUFFICIENT_STORAGE error on Android [closed]
...ilable. Rebooting the target device fixes the problem briefly, but it soon comes back. There are hundreds (if not thousands) of message board posts from people asking why the problem occurs, but the folks at Google are frustratingly silent on the issue.
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