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How to access the correct `this` inside a callback?
...e not necessary
alert(this.data); // but might improve readability
}).bind(this); // <- here we are calling `.bind()`
transport.on('data', boundFunction);
}
In this case, we are binding the callback's this to the value of MyConstructor's this.
Note: When a binding co...
What is the difference between application server and web server?
...: Web server with an application server
if the query you want to run has already been done previously and no data has changed since then, the server will generate the results without having to send the request to the database server. This allows a real-time query where a second client can access the...
Error in finding last used cell in Excel with VBA
... @KeithPark: Please go ahead :) Knowledge only has a meaning if it is spread :)
– Siddharth Rout
Aug 29 '14 at 7:11
9
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What is this Javascript “require”?
I'm trying to get Javascript to read/write to a PostgreSQL database. I found this project on github. I was able to get the following sample code to run in node.
...
What's wrong with this 1988 C code?
...hat you aren't to include them. You could take it at face value, you could read lots of code and notice they never seem to be there. Or, the OP could mess up by including them, ask about the "bizarre" error, and find out: oops, no semicolons required for preprocessor directives! This is programming,...
Django dynamic model fields
... django-dynamo idea further. The project is still undocumented but you can read the code at https://github.com/charettes/django-mutant.
Actually FK and M2M fields (see contrib.related) also work and it's even possible to define wrapper for your own custom fields.
There's also support for model opt...
What is the difference between partitioning and bucketing a table in Hive ?
...You'll have 50 buckets with data, and 206 buckets with no data.
Someone already mentioned how partitions can dramatically cut the amount of data you're querying. So in my example table, if you want to query only from a certain date forward, the partitioning by year/month/day is going to dramaticall...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
I'm now reading documentation on Twitter Bootstrap 3, and tried to follow column ordering as shown in this page but hit the wall. I don't understand why such a code works nor how to correctly specify the setting. What I want to show is one grid, which is consisted of length 5, and the other leng...
Select first row in each GROUP BY group?
...rchases (customer, total DESC, id);
May be too specialized. But use it if read performance for the particular query is crucial. If you have DESC NULLS LAST in the query, use the same in the index so that sort order matches and the index is applicable.
Effectiveness / Performance optimization
Weigh ...
What is Mocking?
...le in-memory structure for storing records. The object under test can then read and write records to the database stub to allow it to execute the test. This could test some behavior of the object not related to the database and the database stub would be included just to let the test run.
If you ins...