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“Wrong type argument: commandp” error when binding a lambda to a key
... I think there are no down sides. From the documentation: >> The "call" to ‘interactive’ is actually a declaration rather than a function; it tells ‘call-interactively’ how to read arguments to pass to the function. When actually called, ‘interactive’ just returns...
What is Model in ModelAndView from Spring MVC?
...essage","ERROR!!");
}
}
/* "registerPage" is the .jsp page -> which will viewed.
/* "errorMessage" is the variable that could be displayed in page using -> **${errorMessage}**
/* "Registered Successfully!" or "ERROR!!" is the message will be printed based on **if-else condition**...
How can I use threading in Python?
...as asked in 2010, there has been real simplification in how to do simple multithreading with Python with map and pool.
The code below comes from an article/blog post that you should definitely check out (no affiliation) - Parallelism in one line: A Better Model for Day to Day Threading Tasks. I'll s...
Converting a Uniform Distribution to a Normal Distribution
...robability function p(x) you get the distribution by integrating over it -> d(x) = integral(p(x)) and use its inverse: Inv(d(x)). Now use the random probability function (which have uniform distribution) and cast the result value through the function Inv(d(x)). You should get random values cast...
What is the meaning of addToBackStack with null parameter?
...ack the
previous fragment by pressing the Back button.
If you add multiple changes to the transaction (such as another add()
or remove()) and call addToBackStack(), then all changes applied
before you call commit() are added to the back stack as a single
transaction and the Back button ...
How do I alter the position of a column in a PostgreSQL database table?
...re database with data, then dump just the schema (pg_dump -s databasename > databasename_schema.sql). Next edit the schema file to rearrange the columns as you would like, then recreate the database from the schema, and finally restore the data into the newly created database.
...
Chaining multiple MapReduce jobs in Hadoop
...t(j2.waitForCompletion(true)?0:1);
}
}
THE SEQUENCE IS
(JOB1)MAP->REDUCE-> (JOB2)MAP
This was done to get the keys sorted yet there are more ways such as using a treemap
Yet I want to focus your attention onto the way the Jobs have been chained!!
Thank you
...
Difference between EXISTS and IN in SQL?
...hat way also i.e. select case when exists (select 1 from emp where salary > 1000) then 1 else 0 end as sal_over_1000
– smooth_smoothie
Aug 25 '16 at 4:17
...
Disabling Chrome cache for website development
... good:
1. Deactivate Chrome Cache in the Registry
Open Registry (Start -> Command -> Regedit)
Search for: HKEY_CLASSES_ROOT\ChromeHTML\shell\open\command
Change the part after ...chrom.exe" to this value: –disable-application-cache –media-cache-size=1 –disk-cache-size=1 — "%1"
Ex...
Can't start Eclipse - Java was started but returned exit code=13
...
For me the solution was to go into (on Windows 8.1):
System > Advanced system setting > Environment Variables
Under 'System variables' in the 'Path' variable there was the following first:
C:\ProgramData\Oracle\Java\javapath;
I removed this and Eclipse worked again!
...