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Insert a row to pandas dataframe
... as both objects are of the same type. Maybe the issue is that you need to cast your second vector to a dataframe? Using the df that you defined the following works for me:
df2 = pd.DataFrame([[2,3,4]], columns=['A','B','C'])
pd.concat([df2, df])
...
Intersection and union of ArrayLists in Java
...tal = (ArrayList<String>) intersection(list2, list1) --->cannot cast java.util.arraylist to java.util.arraylist<string>
– user3402040
Feb 11 '16 at 9:34
...
Deserialize JSON with C#
...wing:
var jsonData = JObject.Parse("your JSON data here");
Then you can cast jsonData to JArray, and you can use a for loop to get data at each iteration.
Also, I want to add something:
for (int i = 0; (JArray)jsonData["data"].Count; i++)
{
var data = jsonData[i - 1];
}
Working with dynam...
When should a class be Comparable and/or Comparator?
...he compile-time error) ; your implementation has to cope with objects, and cast as needed but in a robust way.
Comparable<Itself> is very strict on the contrary.
Funny, when you subclass Itself to Subclass, Subclass must also be Comparable and be robust about it (or it would break Liskov ...
How to check if a variable is an integer in JavaScript?
...
That depends, do you also want to cast strings as potential integers as well?
This will do:
function isInt(value) {
return !isNaN(value) &&
parseInt(Number(value)) == value &&
!isNaN(parseInt(value, 10));
}
With Bitwi...
How to convert std::string to LPCSTR?
...
std::string myString("SomeValue");
LPSTR lpSTR = const_cast<char*>(myString.c_str());
myString is the input string and lpSTR is it's LPSTR equivalent.
share
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improve th...
Dynamic cell width of UICollectionView depending on label width
... signature).
Call collectionView...sizeForItemAt method.
No need to bridge-cast String to NSString to call size(withAttributes: method. Swift String has it out of the box.
Attributes are the same you set for (NS)AttributedString, i.e. font family, size, weight, etc. Optional parameter.
Sample so...
深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...一致：
void printStringByChar(std::string &str) {
char *p = const_cast<char *> (str.c_str());
char q[1024];
while (*p != '\0') {
sprintf(q, "%02x, %u, %c", *p, *p, *p);
std::cout << q << std::endl;
p++;
}
}
（十六进制，无符号整形，字符型）
Shift-jis:
0xff...
How to rethrow the same exception in SQL Server
..., @ErrorState int;
select @ErrorMessage = ERROR_MESSAGE() + ' Line ' + cast(ERROR_LINE() as nvarchar(5)), @ErrorSeverity = ERROR_SEVERITY(), @ErrorState = ERROR_STATE();
if @@trancount > 0 rollback transaction;
raiserror (@ErrorMessage, @ErrorSeverity, @ErrorState);
end catch
...
What is the printf format specifier for bool?
...
The cast is not needed.
– user529758
Jun 25 '13 at 20:52
...