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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { //inet_init->inet_register_protosw, inetsw_array
err = 0;
/* Check the non-wild match. */
if (protocol == answer->protocol) {
if (protocol != IPPROTO_IP)
break;
} else {
..
}
}
...
sock->ops = answer...
How to create an object for a Django model with a many to many field?
... After reading the saverio's answer, I decided to investigate the issue a bit more in depth. Here are my findings.
This was my original suggestion. It works, but isn't optimal. (Note: I'm using Bars and a Foo instead of Users and a Sample, but you get the idea).
bar1 = Bar.objects.get(pk=1)
bar2 =...
getting the ng-object selected with ng-change
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Instead of setting the ng-model to item.size.code, how about setting it to size:
<select ng-options="size as size.name for size in sizes"
ng-model="item" ng-change="update()"></select>
Then in your update() method, $scope.item will be set to...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
I am working with the pandas library and I want to add two new columns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
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Remove columns from dataframe where ALL values are NA
I'm having trouble with a data frame and couldn't really resolve that issue myself:
The dataframe has arbitrary properties as columns and each row represents one data set .
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Loop through an array php
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Using foreach loop without key
foreach($array as $item) {
echo $item['filename'];
echo $item['filepath'];
// to know what's in $item
echo '<pre>'; var_dump($item);
}
Using foreach loop with key
foreach($array as $i =&g...
remove legend title in ggplot
I'm trying to remove the title of a legend in ggplot2 :
5 Answers
5
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Can you do a partial checkout with Subversion?
If I had 20 directories under trunk/ with lots of files in each and only needed 3 of those directories, would it be possible to do a Subversion checkout with only those 3 directories under trunk?
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How can I add a class attribute to an HTML element generated by MVC's HTML Helpers?
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In order to create an anonymous type (or any type) with a property that has a reserved keyword as its name in C#, you can prepend the property name with an at sign, @:
Html.BeginForm("Foo", "Bar", FormMethod.Post, new { @class = "myclass"})
For VB.NET this syntax would be a...
How to read environment variables in Scala
In Java, reading environment variables is done with System.getenv() .
6 Answers
6
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