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Why is Class.newInstance() “evil”?
...#newInstance()):
Note that this method propagates any exception thrown by the nullary constructor, including a checked exception. Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler. The Constructor.newInstance method avoi...
How can I read large text files in Python, line by line, without loading it into memory?
I need to read a large file, line by line. Lets say that file has more than 5GB and I need to read each line, but obviously I do not want to use readlines() because it will create a very large list in the memory.
...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
...dvantage of the fact that exec returns null when there are no more matches by performing the assignment as the loop condition.
var re = /foo_(\d+)/g,
str = "text foo_123 more text foo_456 foo_789 end text",
match,
results = [];
while (match = re.exec(str))
results.push(+match[1]);
...
Python Pandas Error tokenizing data
...e the offending file and to correct the bad lines so that they can be read by read_csv. @PetraBarus, why not just add columns to the CSV files that are missing them (with null values as needed)?
– dbliss
Oct 6 '14 at 22:57
...
Java: Difference between the setPreferredSize() and setSize() methods in components
...ents as expected if a layout manager is present; most layout managers work by getting the preferred (as well as minimum and maximum) sizes of their components, then using setSize() and setLocation() to position those components according to the layout's rules.
For example, a BorderLayout tries to ma...
How do I Geocode 20 addresses without receiving an OVER_QUERY_LIMIT response?
...hen saving the locations -- but it also means :
You'll be able to search by geographical coordinates
i.e. "I want a list of points that are near where I'm now"
Displaying the map will be a lot faster
Even with more than 20 locations on it
Oh, and, also (last but not least) : this will work ;...
What's a correct and good way to implement __hash__()?
...
As @loved.by.Jesus's answer below mentions, hash method should not be defined/overridden for a mutable object (defined by default and uses id for equality and comparison).
– Mr Matrix
Jan 5 at 20:...
PHP Pass variable to next page
... variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
Session:
//On page 1
$_SESSION['varname'] = $var_value;
//On page 2
$var_value = $_SESSION['varname'];
Remember to run the session_start(); stateme...
Cannot refer to a non-final variable inside an inner class defined in a different method
...ass object tries to access the variables after they have been cleaned up.
By making lastPrice and price final, they are not really variables anymore, but constants. The compiler can then just replace the use of lastPrice and price in the anonymous class with the values of the constants (at compile ...
What's the rationale for null terminated strings?
...ts strings much
like vectors of integers and
supplements general rules by a few
conventions. In both BCPL and B a
string literal denotes the address of
a static area initialized with the
characters of the string, packed into
cells. In BCPL, the first packed byte
contains the number o...