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Wolfram's Rule 34 in XKCD [closed]
... 0 1
6: 1 1 0
7: 1 1 1
If you're evaluating a stage in a cellular automaton (CA) that follows rule 2, then whenever a three-bit string matches rule 2's configuration, the center bit becomes (or stays, in this case) true on the next iteration.
A CA...
Determine if an object property is ko.observable
...ervable(vm[key]).
Update from comment:
Here is a function to determine if something is a computed observable:
ko.isComputed = function (instance) {
if ((instance === null) || (instance === undefined) || (instance.__ko_proto__ === undefined)) return false;
if (instance.__ko_proto__ === k...
How to export query result to csv in Oracle SQL Developer?
...000 SET FEEDBACK off --optional SET HEADING off Spool C:\Export\EMP.csv --Now the query SELECT * FROM EMP; Spool OFF
– Jim P
Jan 10 '13 at 15:36
...
What is “rvalue reference for *this”?
...n"; }
};
int main(){
test t;
t.f(); // OK
test().f(); // OK too
}
Now, onto why @Nicol's answer is atleast partly wrong. He says:
Note that this declaration changes the type of *this.
That is wrong, *this is always an lvalue:
§5.3.1 [expr.unary.op] p1
The unary * operator performs indir...
'uint32_t' identifier not found error
...n my page. But it shows this error "syntax error : missing ';' before identifier 'int32_t'" and "missing type specifier - int assumed. Note: C++ does not support default-int".
– kevin
Mar 2 '11 at 2:40
...
Python string.join(list) on object array rather than string array
... you are redefining the list class (keyword) ! Preferably use another identifier name.
Hope you'll find my answer useful.
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Check if a number is int or float
...t;> y = 12.0
>>> isinstance(y, float)
True
So:
>>> if isinstance(x, int):
print 'x is a int!'
x is a int!
_EDIT:_
As pointed out, in case of long integers, the above won't work. So you need to do:
>>> x = 12L
>>> import numbers
>>> isin...
Delete files older than 10 days using shell script in Unix [duplicate]
...
It depends of the date of the modification, like what ls -l displays. Are the date the same as ls -l ? But a simple test will tell you =)
– Gilles Quenot
Nov 21 '12 at 9:06
...
How to fix “ImportError: No module named …” error in Python?
...nt then of having init.py in the root folder? It seems to serve no purpose if you edit either sys.path or the pythonpath.
– user1980175
Jan 4 '14 at 23:13
11
...
UTF-8: General? Bin? Unicode?
...general_ci is faster than utf8_unicode_ci, but less correct.
Here is the difference:
For any Unicode character set, operations performed using the _general_ci collation are faster than those for the _unicode_ci collation. For example, comparisons for the utf8_general_ci collation are faster, b...