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Which is more efficient, a for-each loop, or an iterator?
...n invokeInterface virtual call (go through all the classes, then do method table lookup before the jump).
the implementation of the iterator has to do at least 2 fields lookup in order to make hasNext() call figure the value: #1 get current count and #2 get total count
inside the body loop, there is...
How to export query result to csv in Oracle SQL Developer?
...take an export to your local system from sql developer.
Path : C:\Source_Table_Extract\des_loan_due_dtls_src_boaf.csv
SPOOL "Path where you want to save the file"
SELECT /*csv*/ * FROM TABLE_NAME;
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The tilde operator in Python
...se complement operator in python which essentially calculates -x - 1
So a table would look like
i ~i
0 -1
1 -2
2 -3
3 -4
4 -5
5 -6
So for i = 0 it would compare s[0] with s[len(s) - 1], for i = 1, s[1] with s[len(s) - 2].
As for your other question, this can be useful for a range of ...
Search text in fields in every table of a MySQL database
I want to search in all fields from all tables of a MySQL database a given string, possibly using syntax as:
24 Answers
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How do you truncate all tables in a database using TSQL?
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For SQL 2005,
EXEC sp_MSForEachTable 'TRUNCATE TABLE ?'
Couple more links for 2000 and 2005/2008..
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Why would you use an ivar?
... in the implementations of an accessor, a convenience constructor, copy, mutableCopy, and archiving/serialization implementations.
It's also more frequent as one moves from the everything has a public readwrite accessor mindset to one which hides its implementation details/data well. Sometimes you n...
How to rename a single column in a data.frame?
...estion, but it is worth noting that you can now use setnames from the data.table package.
library(data.table)
setnames(DF, "oldName", "newName")
# or since the data.frame in question is just one column:
setnames(DF, "newName")
# And for reference's sake, in general (more than once column)
nms ...
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
...rs can't be represented more simply with a range: !"^_`[].
Use an ACSII table to find ranges for character classes.
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Find a value anywhere in a database
Given a #, how do I discover in what table and column it could be found within?
18 Answers
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Is std::unique_ptr required to know the full definition of T?
... compiler will tell you.
However, in case it is helpful to you, here is a table which documents several members of shared_ptr and unique_ptr with respect to completeness requirements. If the member requires a complete type, then entry has a "C", otherwise the table entry is filled with "I".
Comple...