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Passing variable arguments to another function that accepts a variable argument list
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You can't do it directly; you have to create a function that takes a va_list:
#include <stdarg.h>
static void exampleV(int b, va_list args);
void exampleA(int a, int b, ...) // Renamed for consistency
{
va_list args;
do_something(a); // Use argument a somehow
...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
...er, behind the scenes, will call
SELECT NAME, AGE FROM PERSON WHERE PERSON_ID = ?
UPDATE PERSON SET AGE = ? WHERE PERSON_ID = ?
If i call getReference method, JPA provider, behind the scenes, will call
UPDATE PERSON SET AGE = ? WHERE PERSON_ID = ?
And you know why ???
When you call getRefere...
How can I alter a primary key constraint using SQL syntax?
...the constraint with an Alter table then recreate it.
ALTER TABLE <Table_Name>
DROP CONSTRAINT <constraint_name>
ALTER TABLE <Table_Name>
ADD CONSTRAINT <constraint_name> PRIMARY KEY (<Column1>,<Column2>)
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Is it possible to delete an object's property in PHP?
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unset($a->new_property);
This works for array elements, variables, and object attributes.
Example:
$a = new stdClass();
$a->new_property = 'foo';
var_export($a); // -> stdClass::__set_state(array('new_property' => 'foo'))
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Suppress/ print without b' prefix for bytes in Python 3
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If we take a look at the source for bytes.__repr__, it looks as if the b'' is baked into the method.
The most obvious workaround is to manually slice off the b'' from the resulting repr():
>>> x = b'\x01\x02\x03\x04'
>>> print(repr(x))
b'\x01\x02...
Regular Expression: Any character that is NOT a letter or number
... \w is for Word characters and is exactly the same as [a-zA-Z0-9_] (notice that underscore is considered a word character.) ...so the shorthand would be str.replace(/[^\w]/g, ' ')
– Joel Mellon
Aug 30 '13 at 16:41
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Get selected value in dropdown list using JavaScript
...electItem.value}}</p>
// JavaScript
$scope.items = [{
value: 'item_1_id',
text: 'Item 1'
}, {
value: 'item_2_id',
text: 'Item 2'
}];
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Can't open config file: /usr/local/ssl/openssl.cnf on Windows [duplicate]
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The solution is running this command:
set OPENSSL_CONF=C:\OpenSSL-Win32\bin\openssl.cfg
or
set OPENSSL_CONF=[path-to-OpenSSL-install-dir]\bin\openssl.cfg
in the command prompt before using openssl command.
Let openssl know for sure where to find its .cfg file.
Al...
How do I add the contents of an iterable to a set?
...rt Timer
a = set(range(1, 100000))
b = list(range(50000, 150000))
def one_by_one(s, l):
for i in l:
s.add(i)
def cast_to_list_and_back(s, l):
s = set(list(s) + l)
def update_set(s,l):
s.update(l)
results are:
one_by_one 10.184448844986036
cast_to_list_and_back 7.96925...
how to “reimport” module to python then code be changed after import
...port sys then reload(sys.modules['foo']) or perhaps reload(sys.modules[bar.__module__])
– drevicko
Oct 28 '13 at 1:02
3
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