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Linq: GroupBy, Sum and Count
... ProductName = cl.First().Name,
Quantity = cl.Count().ToString(),
Price = cl.Sum(c => c.Price).ToString(),
}).ToList();
The use of First() here to get the product name assumes that every product with the same product code has the same product name....
Save classifier to disk in scikit-learn
...ed scikit-learn estimators, but can only
pickle to the disk and not to a string:
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Exclude a sub-directory using find
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-path matches the whole string, so if you're doing find ., then your -path strings need to be ./path/to/directory/*
– Heath Borders
Nov 14 '14 at 22:34
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Setting up a JavaScript variable from Spring model by using Thymeleaf
...java
@Controller
@RequestMapping("/showingTymleafTextInJavaScript")
public String thankYou(Model model){
model.addAttribute("showTextFromJavaController","dummy text");
return "showingTymleafTextInJavaScript";
}
//thymleaf page javascript page
<script>
var showtext = "[[${showTextFromJavaC...
Pass request headers in a jQuery AJAX GET call
...In the following block, "data" automatically passes the values in the querystring. Is there a way to pass that data in the request header instead ?
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error: ‘NULL’ was not declared in this scope
...
NULL can also be found in:
#include <string.h>
String.h will pull in the NULL from somewhere else.
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Find and replace with sed in directory and sub directories
... he wants to find all files in sub directories contain that string and replace, not only a single file
– phuclv
Jun 9 '17 at 9:58
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Declare slice or make slice?
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Can i say the same for map? var m map[string]int vs m:= make(map[string]int) ? Thanks.
– joshua
Mar 6 '15 at 7:46
11
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What's the difference between struct and class in .NET?
... its own copy.
This can be shown with an example:
struct MyStruct
{
string MyProperty { get; set; }
}
void ChangeMyStruct(MyStruct input)
{
input.MyProperty = "new value";
}
...
// Create value type
MyStruct testStruct = new MyStruct { MyProperty = "initial value" };
ChangeMyStruct(...
Simple Log to File example for django 1.3+
...read-1 ] [INFO ] [djangoproject.logger] This is a manually logged INFO string.
2016-04-05 22:12:32,984 [Thread-1 ] [DEBUG] [djangoproject.logger] This is a manually logged DEBUG string.
2016-04-05 22:12:32,984 [Thread-1 ] [ERROR] [django.request ] Internal Server Error: /
Traceback ...