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Difference between Hive internal tables and external tables?
...use lists of partitions without going to the file-system and finding them, etc). These sorts of things are the 'metadata'.
When you drop an internal table, it drops the data, and it also drops the metadata.
When you drop an external table, it only drops the meta data. That means hive is ignorant o...
Why use finally in C#?
...any time you use unmanaged code requests like stream readers, db requests, etc; and you want to catch the exception then use try catch finally and close the stream, data reader, etc. in the finally, if you don't when it errors the connection doesn't get closed, this is really bad with db requests
...
Batch script loop
...this:
for /l %x in (1, 1, 100) do (
echo %x
copy %x.txt z:\whatever\etc
)
or in a batch file
for /l %%x in (1, 1, 100) do (
echo %%x
copy %%x.txt z:\whatever\etc
)
Key:
/l denotes that the for command will operate in a numerical fashion, rather than operating on a set of files
%x i...
What does AngularJS do better than jQuery? [closed]
...ts data on the page,
and hence, css properties like color, display/hide, etc changes dont
affect the model.
I can see your point here about "simple" DOM manipulation being cleaner, but only rarely and it would have to be really "simple". I think DOM manipulation is one the areas, just like dat...
WebClient vs. HttpWebRequest/HttpWebResponse
...s you more control on the request. You can set cookies, headers, protocol, etc... In the response, you can also retrieve the cookies and headers
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Sql Server equivalent of a COUNTIF aggregate function
...ch item appeared in my results.
So I used this...
SELECT COL1, COL2, ... ETC
(1 / SELECT a.vcount
FROM (SELECT vm2.visit_id, count(*) AS vcount
FROM dbo.visitmanifests AS vm2
WHERE vm2.inactive = 0 AND vm2.visit_id = vm.Visit_ID
...
Java: Static Class?
...er alternatives like IllegalStateException, UnsupportedOperationException, etc?
– Pacerier
Jun 25 '14 at 0:36
@Pacerie...
How to debug JavaScript / jQuery event bindings with Firebug or similar tools?
...has color-coded highlights for different types of events (mouse, keyboard, etc.). When you hover over them, it shows the body of the event handler, how it was attached, and the file/line number (on WebKit and Opera). You can also trigger the event manually.
It can't find every event because there's...
warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
... if I type the command above, I get: sudo: /etc/sudoers is mode 0644, should be 0440 Segmentation fault
– Xandman
Oct 17 '10 at 12:50
...
Windows equivalent of the 'tail' command
...
Commands such as P, S, etc. can only be input by the user at the prompt. They cannot be passed-in to the more command. Thus, the example above does not work
– Philibert Perusse
Jul 23 '12 at 22:16
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