大约有 30,000 项符合查询结果（耗时：0.0491秒） [XML]
How to plot two histograms together in R?
I am using R and I have two data frames: carrots and cucumbers. Each data frame has a single numeric column which lists the length of all measured carrots (total: 100k carrots) and cucumbers (total: 50k cucumbers).
...
How to convert from System.Enum to base integer?
I'd like to create a generic method for converting any System.Enum derived type to its corresponding integer value, without casting and preferably without parsing a string.
...
How to run a PowerShell script without displaying a window?
...arg $pwd\foo.ps1 -WindowStyle Hidden
You can also do this with VBScript: http://blog.sapien.com/index.php/2006/12/26/more-fun-with-scheduled-powershell/
Schedule Hidden PowerShell Tasks (Internet Archive)
More fun with scheduled PowerShell (Internet Archive)
(Via this forum thread.)
...
How to generate the “create table” sql statement for an existing table in postgreSQL
I have created a table in postgreSQL. I want to look at the SQL statement used to create the table but cannot figure it out.
...
Exposing database IDs - security risk?
... a business I'd highly suggest keeping your private ids out of public eye. https://medium.com/lightrail/prevent-business-intelligence-leaks-by-using-uuids-instead-of-database-ids-on-urls-and-in-apis-17f15669fd2e
share
...
Is the practice of returning a C++ reference variable evil?
This is a little subjective I think; I'm not sure if the opinion will be unanimous (I've seen a lot of code snippets where references are returned).
...
How to check if an appSettings key exists?
How do I check to see if an Application Setting is available?
9 Answers
9
...
Parsing command-line arguments in C?
... GNU C Library documentation has some nice examples for Getopt and Argp.
http://www.gnu.org/software/libc/manual/html_node/Getopt.html
http://www.gnu.org/software/libc/manual/html_node/Argp.html
Example for using Getopt
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h&g...
Why does Date.parse give incorrect results?
Fri Jul 08 2005 00:00:00 GMT-0700 (PST)
11 Answers
11
...
What is this 'Lambda' everyone keeps speaking of?
What is this 'Lambda' everyone keeps speaking of? A lot of people seem to love it, but all I can gather from it is it is just a way of cramming lots of lines of code into a single expression.
...