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Difference between Build Solution, Rebuild Solution, and Clean Solution in Visual Studio?
...ll clean and then build the solution from scratch, ignoring anything it's done before. The difference between this and "Clean, followed by Build" is that Rebuild will clean-then-build each project, one at a time, rather than cleaning all and then building all.
Clean solution will remove the build ar...
Advantages of Binary Search Trees over Hash Tables
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One advantage that no one else has pointed out is that binary search tree allows you to do range searches efficiently.
In order to illustrate my idea, I want to make an extreme case. Say you want to get all the elements whos...
Omitting the second expression when using the if-else shorthand
...worried about file size, just create a minified version of it with help of one of the many JS compressors. (e.g Google's Closure Compiler)
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follo...
Foreign Key to non-primary key
I have a table which holds data, and one of those rows needs to exist in another table. So, I want a foreign key to maintain referential integrity.
...
Chaining multiple MapReduce jobs in Hadoop
... data after a job has finished you can do this in your code. The way i've done it before is using something like:
FileSystem.delete(Path f, boolean recursive);
Where the path is the location on HDFS of the data. You need to make sure that you only delete this data once no other job requires it.
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Multiple linear regression in Python
...,1,2,5,6,7,8,9,7,8,7,8,7,7,7,7,7,7,6,6,4,4,4]
]
def reg_m(y, x):
ones = np.ones(len(x[0]))
X = sm.add_constant(np.column_stack((x[0], ones)))
for ele in x[1:]:
X = sm.add_constant(np.column_stack((ele, X)))
results = sm.OLS(y, X).fit()
return results
Result:
prin...
Can Flask have optional URL parameters?
...er way is to write
@user.route('/<user_id>', defaults={'username': None})
@user.route('/<user_id>/<username>')
def show(user_id, username):
pass
But I guess that you want to write a single route and mark username as optional? If that's the case, I don't think it's possible....
How to delete or add column in SQLITE?
...d or remove constraints from a table.
You can:
create new table as the one you are trying to change,
copy all data,
drop old table,
rename the new one.
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NPM modules won't install globally without sudo
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One small detail to add is that you have to make the ~/npm directory yourself. Else, npm will exit with a ENOENT errors.
– Jason Farnsworth
Oct 3 '14 at 21:56
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Pass Variables by Reference in Javascript
...to, so I want to put them in a for loop and perform the operations to each one.
15 Answers
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