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Change column type from string to float in Pandas
...g to float values
0 8.0
1 6.0
2 7.5
3 3.0
4 0.9
dtype: float64
As you can see, a new Series is returned. Remember to assign this output to a variable or column name to continue using it:
# convert Series
my_series = pd.to_numeric(my_series)
# convert column "a" of a DataFrame
df["a"...
What is the size of an enum in C?
...h to hold int values. The compiler is free to choose the actual type used based on the enumeration constants defined so it can choose a smaller type if it can represent the values you define. If you need enumeration constants that don't fit into an int you will need to use compiler-specific extens...
What is the equivalent of bigint in C#?
...
That corresponds to the long (or Int64), a 64-bit integer.
Although if the number from the database happens to be small enough, and you accidentally use an Int32, etc., you'll be fine. But the Int64 will definitely hold it.
And the error you get if you use so...
Try-catch speeding up my code?
...ilt-in support for SEH (Structure Exception Handling) which is stack-frame based.
One behavior of the register allocation algorithm in the jitter can be inferred from playing with this code. It appears to be aware of when the jitter is trying to inline a method. One rule it appears to use that on...
Abstract Class vs Interface in C++ [duplicate]
...ve body" - there is no can, pure virtual by definition have no body in the base class and they must have a body in the derived class. Also, you do not require the virtual keyword for multiple inheritance in C++. In fact, good design that uses multiple inheritance avoids the virtual keyword (well, th...
Meaning of epsilon argument of assertEquals for double values
... numbers. With this delta value you can control the evaluation of equality based on a error factor.
Also some floating-point values can have special values like NAN and -Infinity/+Infinity which can influence results.
If you really intend to compare that two doubles are exactly equal it is best c...
How to install latest version of git on CentOS 7.x/6.x
... This answer must be applied. Already applied answer with --disablerepo=base,updates doesn't work for me.
– Kirby
Aug 12 '16 at 10:48
1
...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...t it's unlikely to be universally-applicable. I have a bunch of other Java-based software tat I run as well like Eclipse, JasperReports iReport, etc. that are all likely to be affected by this. I think I'd rather just move the JDK1.8 directory somewhere else and use that explicitly with JAVA_HOME fo...
Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...ct;
interface
uses
Windows, Messages, SysUtils, Classes, Dialogs, IdBaseComponent, IdComponent,
IdTCPConnection, IdTCPClient, SyncObjs, superobject;
type
TCloudConnector = class
private
FLocker: TCriticalSection;
FConnector: TIdTCPClient;
FTimeout: Integer;
FUser: string;
FToken: s...
Is there a way to detect if an image is blurry?
...ding off of Nike's answer. Its straightforward to implement the laplacian based method with opencv:
short GetSharpness(char* data, unsigned int width, unsigned int height)
{
// assumes that your image is already in planner yuv or 8 bit greyscale
IplImage* in = cvCreateImage(cvSize(width,he...