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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...
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
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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 ...
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...
Officially, what is typename for?
On occasion I've seen some really indecipherable error messages spit out by gcc when using templates... Specifically, I've had problems where seemingly correct declarations were causing very strange compile errors that magically went away by prefixing the typename keyword to the beginning of the...
Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
...not imply that using the same format specifier means that the data written by a [f]printf() can be read by [f]scanf(). In general, using the same format specifier for scanf() that was used by printf() will not successfully read the data. For example, space padding that can be inserted by a prinf()...
Hibernate - A collection with cascade=”all-delete-orphan” was no longer referenced by the owning ent
...he "A collection with cascade="all-delete-orphan" was no longer referenced by the owning entity instance" exception. Do you have an idea why? Thank you very much!
– ovdsrn
Dec 12 '12 at 10:42
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How do I determine whether an array contains a particular value in Java?
...
Creating then the collection is going to be dominated by code loading time (which is technically O(n) but practically constant).
– Tom Hawtin - tackline
Mar 7 '12 at 13:23
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How can I distinguish whether Switch,Checkbox Value is changed by user or programmatically (includin
How to implement method isNotSetByUser() ?
16 Answers
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