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python pandas dataframe to dictionary
I've a two columns dataframe, and intend to convert it to python dictionary - the first column will be the key and the second will be the value. Thank you in advance.
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How to get all selected values from ?
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First, use Array.from to convert the HTMLCollection object to an array.
let selectElement = document.getElementById('categorySelect')
let selectedValues = Array.from(selectElement.selectedOptions)
.map(option => option.value) // make sure...
Hidden Features of Java
...ls beyond just locks, they live in java.util.concurrent and a specifically interesting example is the java.util.concurrent.atomic subpackage that contains thread-safe primitives that implement the compare-and-swap operation and can map to actual native hardware-supported versions of these operations...
Twitter oAuth callbackUrl - localhost development
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Callback URL edited
http://localhost:8585/logintwitter.aspx
Convert to
http://127.0.0.1:8585/logintwitter.aspx
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undefined reference to `WinMain@16'
...g Windows API-level program:
#define NOMINMAX
#include <windows.h>
int main()
{
MessageBox( 0, "Blah blah...", "My Windows app!", MB_SETFOREGROUND );
}
Now let's build it using GNU toolchain (i.e. g++), no special options. Here gnuc is just a batch file that I use for that. It only sup...
Alter Table Add Column Syntax
...loyeeID numeric NOT NULL IDENTITY (1, 1)
ALTER TABLE Employees ADD CONSTRAINT
PK_Employees PRIMARY KEY CLUSTERED
(
EmployeeID
) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
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How can I define a composite primary key in SQL?
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CREATE TABLE `voting` (
`QuestionID` int(10) unsigned NOT NULL,
`MemberId` int(10) unsigned NOT NULL,
`vote` int(10) unsigned NOT NULL,
PRIMARY KEY (`QuestionID`,`MemberId`)
);
s...
Get current folder path
I want to create a program that converts files. I would like the user to be able to place the executable file in any directory, and when executing that program (double-clicking on the .exe) I want the program to process all the files within the current folder where the exe file exists . How can the...
What does threadsafe mean?
...he mechanism used though multiple threads running the same code should not interfere with each other.
– Vincent Ramdhanie
Mar 28 '16 at 15:49
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Print JSON parsed object?
... SuperUberDuper was asking if the object could be logged or viewed without converting it to a string. If viewing in the browser the DOM needs an element, you can stringify json so and set an elements contents innerHTML to that string to view it on the page.
– jasonleonhard
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