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Delete all documents from index/type without deleting type
I know one can delete all documents from a certain type via deleteByQuery.
15 Answers
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Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
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Your second example does not work if you send the argument by reference. Did you mean
void copyVecFast(vec<int> original) // no reference
{
vector<int> new_;
new_.swap(original);
}
That would work, but an easier way is
vector<int> new_(original);
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Which is better option to use for dividing an integer number by 2?
...ich of the following techniques is the best option for dividing an integer by 2 and why?
23 Answers
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How to break a line of chained methods in Python?
...uery(Subkeyword.subkeyword_id, Subkeyword.subkeyword_word)
.filter_by(subkeyword_company_id=self.e_company_id)
.filter_by(subkeyword_word=subkeyword_word)
.filter_by(subkeyword_active=True)
.one()
)
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Reason for Column is invalid in the select list because it is not contained in either an aggregate f
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2 mno
2 pqr
And I do the following query:
SELECT a, b
FROM T
GROUP BY a
The output should have two rows, one row where a=1 and a second row where a=2.
But what should the value of b show on each of these two rows? There are three possibilities in each case, and nothing in the query makes ...
Unix's 'ls' sort by name
Can you sort an ls listing by name?
11 Answers
11
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How to sort a list in Scala by two fields?
how to sort a list in Scala by two fields, in this example I will sort by lastName and firstName?
4 Answers
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How do I do top 1 in Oracle?
...nctions to order and take the top x:
select max(fname) over (rank() order by some_factor) from MyTbl
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Selecting a row of pandas series/dataframe by integer index
...Out[6]:
A B
2 -0.470056 1.192211
[] slices the rows (by label location) only
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AI2 SideBar Extension
...n Motivation With smaller apps, the implemented functions can be triggered by a button. With larger apps, however, the available space quickly decreases and the layout becomes confusing. A side bar can help here. There are a number of implementations, but I haven't found a sufficiently extensive o...