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ZMQ: 基本原理 - 开源 & Github - 清泛网移动版 - 专注C/C++及内核技术
...q_connect (s, "tcp://192.168.0.111:5555");
/* Message routing */
const char data [] = "ABC";
zmq_send (s, data, sizeof (data), 0);
区分拓扑建立和消息路由严格地说不是不可缺少的。毕竟，混合这两个为一个单独的函数是很容易的：
zmq_send (s, "tcp://19...
How do I vertically align text in a div?
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@Flextra: This is why folks still use tables for grid layout. Vertical align (or anything with height & dynamic data) can be challenging with pure CSS. You have to be willing to do weird hacks like this (somewhat defeats the...
multiprocessing: sharing a large read-only object between processes?
...ults from stdin, does work, writes intermediate results on stdout.
Connect all the workers as a pipeline:
process1 <source | process2 | process3 | ... | processn >result
Each process reads, does work and writes.
This is remarkably efficient since all processes are running concurrently. T...
In a django model custom save() method, how should you identify a new object?
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Not all models have an id attribute, i.e. a model extending another through a models.OneToOneField(OtherModel, primary_key=True). I think you need to use self.pk
– AJP
Apr 9 '13 at 10:21
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Get domain name from given url
...blem. Just get in the habit of using java.net.URI instead.
public static String getDomainName(String url) throws URISyntaxException {
URI uri = new URI(url);
String domain = uri.getHost();
return domain.startsWith("www.") ? domain.substring(4) : domain;
}
should do what you want.
...
How can I rename a field for all documents in MongoDB?
...above are: { upsert:false, multi:true }. You need the multi:true to update all your records.
Or you can use the former way:
remap = function (x) {
if (x.additional){
db.foo.update({_id:x._id}, {$set:{"name.last":x.name.additional}, $unset:{"name.additional":1}});
}
}
db.foo.find().forEach...
Finding a branch point with Git?
... B. Here are three ways that I found, after a bit of tinkering:
1. visually, with gitk:
You should visually see a tree like this (as viewed from master):
or here (as viewed from topic):
in both cases, I've selected the commit that is B in my graph. Once you click on it, its full SHA is p...
How to wait for a keypress in R?
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This answer is similar to that of Simon's, but does not require extra input other than a newline.
cat("Press Enter to continue...")
invisible(scan("stdin", character(), nlines = 1, quiet = TRUE))
Using nlines=1 instead of n=1, the user can simply press enter to continue the Rscript.
...
Passing a 2D array to a C++ function
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@Zack: You're right, there're only really two cases; one is a pointer-to-pointer and other being a single pointer to an integer array of size n i.e. int (*a) [10].
– legends2k
Jul 10 '13 at 10:44
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What is the difference between a route and resource in New Router API?
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That is much clearer. Thanks for the extra example, mavilein.
– Patrick M
Mar 4 '14 at 19:44
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