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How does Hadoop process records split across block boundaries?
...ow away first record
// because we always (except the last split) read one extra line in
// next() method.
if (start != 0) {
start += in.readLine(new Text(), 0, maxBytesToConsume(start));
}
this.pos = start;
from this I believe hadoop will read one extra line for each split(at the end of current...
I need to securely store a username and password in Python, what are my options?
...assword` to save username onto keyring
# we're just using some known magic string in the username field
keyring.set_password(service_id, MAGIC_USERNAME_KEY, username)
Later to get your info from the keyring
# again, abusing `get_password` to get the username.
# after all, the keyring is just a ke...
Why is there an unexplainable gap between these inline-block div elements? [duplicate]
...o the elements "inline" properties, the same as spacing between words in a string of text in your HTML markup. This is why removing white-space in the markup also works.) The easiest fix is to just float the container. (eg. float: left;) On another note, each id should be unique, meaning you can't u...
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
...
Aha so by using * you are adding extra work for the DB. Ok that's one reason I hadn't thought of.
– Ankur
Jun 4 '10 at 6:50
1
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Transmitting newline character “\n”
...
Try using %0A in the URL, just like you've used %20 instead of the space character.
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http HEAD vs GET performance
... answered Sep 3 '14 at 20:31
Charles ThomasCharles Thomas
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What is the most compatible way to install python modules on a Mac?
...r elixir
( make sure you always type pip-(version) )
That will build an extra Python library in your home dir. Yes, Python will work with more than one library location: one controlled by MacPorts and a user local one for everything missing within MacPorts.
Now notice that I favor pip over easy_...
How to tell if a tag failed to load
...ISS IMHO).
From the spec:
If the src attribute's value is the
empty string or if it could not be
resolved, then the user agent must
queue a task to fire a simple event
named error at the element, and
abort these steps.
~
If the load resulted in an error (for
example a DNS erro...
Static linking vs dynamic linking
... require a some kind of glue layer which often means double dispatch or an extra layer of indirection in function addressing and can cost a little speed (but is function calling time actually a big part of your running time???).
However, if you are running multiple processes which all call the same...
What is the purpose of backbone.js?
... and are generally bad form. Data attributes stored in the DOM can only be strings, you will have to parse them in and out again. It's difficult to store things like arrays, dates or objects, and to parse your data in a structured form.
Data attributes look like this:
<p data-username="derek" d...