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difference between foldLeft and reduceLeft in Scala
... returned backwards, because we used foldLeft instead of foldRight.
Watch One Fold to rule them all for a more in depth explanation.
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sed edit file in place
... without Perl are broken. A single command trumps a chain of commands when one wants elevated permissions and must use sudo. In my mind, the question is about how to avoid manually creating and renaming a temporary file without having to install the latest GNU or BSD sed. Just use Perl.
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Change type of varchar field to integer: “cannot be cast automatically to type integer”
...ar to a function expecting integer or assign a varchar field to an integer one), so you must specify an explicit cast using ALTER TABLE ... ALTER COLUMN ... TYPE ... USING:
ALTER TABLE the_table ALTER COLUMN col_name TYPE integer USING (col_name::integer);
Note that you may have whitespace in you...
Changing Font Size For UITableView Section Headers
Can someone please instruct me on the easiest way to change the font size for the text in a UITableView section header?
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Are Java static initializers thread safe?
...fully-qualified name, but represent different types that cannot be cast to one another.
– Erwin Bolwidt
Jan 8 '16 at 8:51
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Best approach to remove time part of datetime in SQL Server
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Proven less CPU intensive for same total duration a million rows by some one with way too much time on their hands: Most efficient way in SQL Server to get date from date+time?
I saw a similar test elsewhere with similar results too.
I prefer the DATEADD/DATEDIFF because:
varchar is subject to...
Merge PDF files
...ered Jun 21 '16 at 13:12
Paul RooneyPaul Rooney
15.8k88 gold badges3434 silver badges5656 bronze badges
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Android Studio: Add jar as library?
...e four, it started working fine. I think the 'Add as library' step was the one I'd previously missed, and it didn't work until I cleaned it either.
[Edit - added the build.gradle step which is also necessary as others have pointed out]
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Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected:
... hibernate flush the session at the end of the transaction. The below mentioned hibernate error looks like a general error. It doesn't even mentioned which Bean causes the issue. Anyone familiar with this hibernate error?
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Why can't Python's raw string literals end with a single backslash?
...kslash is part of raw string. Once parser enters a raw string (non Unicode one) and encounters a backslash it knows there are 2 characters (a backslash and a char following it).
This way:
r'abc\d' comprises a, b, c, \, d
r'abc\'d' comprises a, b, c, \, ', d
r'abc\'' comprises a, b, c,...