containers

Merits of std::find

一笑奈何 提交于 2019-12-04 05:22:21
Is there any advantage to using C++11's std::find over a container's find method? In the case of std::vector (which does not have a find method) does std::find use some smart algorithm or the naive way of simply iterating over every element? In the case of std::map it seems you need to pass along an std::pair , which is the value_type of an std::map . This does not seem very useful as usually you'd want to find for either a key or a mapped element. What about other containers like std::list or std::set or std::unordered_set ? In the case of std::vector (which does not have a find method) does

How to choose the container 960px wide and not to 1200px in Bootstrap

怎甘沉沦 提交于 2019-12-04 05:20:20
How to choose the container 960px wide and not to 1200px in Bootstrap? Do you just want a fixed width website? If so then then just don't include bootstrap-responsive.css . The default width for a fixed width container will be 960px. Otherwise if you still want the responsive features but no 1200px container you will need to customize your bootstrap install. To do that: Go to http://twitter.github.com/bootstrap/customize.html Under the responsive section uncheck "Large desktops (>1200px)" At the bottom of the page Click "customize and download" to get your custom bootstrap Bootstrap sets

C++ multi-dimensional data handling

末鹿安然 提交于 2019-12-04 05:10:37
问题 Many times, I find myself having to define a container for multi-dimensional data. Let's take an example: I have many Chips, each Chip has many Registers, each Register has many Cells, and each Cell has many Transistors. At some stage of my C++ program I have to read this data, and later I have to use it. I cannot use any external storage for this data: file, data-base, etc. So, should I create some multi-dimensional STL container? A map of maps of vectors, or something like that... ? Or

Running kubernetes autoscalar

北城余情 提交于 2019-12-04 04:31:41
问题 I have a replication controller running with the following spec: apiVersion: v1 kind: ReplicationController metadata: name: owncloud-controller spec: replicas: 1 selector: app: owncloud template: metadata: labels: app: owncloud spec: containers: - name: owncloud image: adimania/owncloud9-centos7 ports: - containerPort: 80 volumeMounts: - name: userdata mountPath: /var/www/html/owncloud/data resources: requests: cpu: 400m volumes: - name: userdata hostPath: path: /opt/data Now I run a hpa

C++ 11 equivalent of java.util.ConcurrentHashMap

不打扰是莪最后的温柔 提交于 2019-12-04 04:27:18
I find myself constantly writing Mutex code in order to synchronize read/write access to a std::unordered_map and other containers so that I can use them as I do java.util.concurrent containers. I was about to start writing a wrapper to encapsulate the Mutex, but I would rather use a well tested library so I don't stuff up the threading. Is there such a library? Intel produced a library called Threading Building Blocks which has two such things: concurrent_hash_map and concurrent_unordered_map. They have slightly different characteristics , but one or the other will probably suit your needs.

DNN Containers

寵の児 提交于 2019-12-04 04:24:30
This might be a general question, but I can't seem to figure it out. What are containers in DNN? Skins are essentially a layout plus a colour scheme for the whole portal. So are containers the skin for desktopmodules? Sorry if this question is novice. I am not confident in DNN yet, and am reading the doco. However i need this answer quite quickly. Cheers. Containers allow you to add style and markup to any module independently of the page skin or the particular module. The layout goes like this: Default.aspx Skin (.ascx control, either the Portal default or selected on the given tab) - this

What would be the “distinct method” that Traversable has in addition to Foldable?

孤街浪徒 提交于 2019-12-04 03:50:38
Foldable is a superclass of Traversable , similarly to how Functor is a superclass of Applicative and Monad . Similar to the case of Monad , where it is possible to basically implement fmap as liftM :: Monad m => (a->b) -> m a -> m b liftM f q = return . f =<< q we could also emulate foldMap as foldLiftT :: (Traversable t, Monoid m) => (a -> m) -> t a -> m foldLiftT f = fst . traverse (f >>> \x -> (x,x)) -- or: . sequenceA . fmap (f >>> \x -> (x, x)) using the Monoid m => (,) m monad. So the combination of superclass and methods bears in both cases a certain redundancy. In case of monads, it

Efficient appending to a variable-length container of strings (Golang)

江枫思渺然 提交于 2019-12-04 03:31:53
问题 The problem: I need to apply multiple regexes to each line of a big log file (like several GB long) , gather non-empty matches and put them all in an array (for serialization and sending it over the network). Slices are not much help if answer to this question holds: If the slice does not have sufficient capacity, append will need to allocate new memory and copy the old one over. For slices with <1024 elements, it will double the capacity, for slices with >1024 elements it will increase it by

How to dump STL container data in gdb?

邮差的信 提交于 2019-12-04 03:10:42
I am not able to dump STL unordered map container values in gdb. variable type is std::unordered_map<> var; my gdb version - 7.7.1 Gdb configuration: configure --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-auto-load-dir=$debugdir:$datadir/auto-load --with-auto-load-safe-path=$debugdir:$datadir/auto-load --with-expat --with-gdb-datadir=/usr/local/share/gdb (relocatable) --with-jit-reader-dir=/usr/local/lib/gdb (relocatable) --without-libunwind-ia64 --with-lzma --with-separate-debug-dir=/usr/local/lib/debug (relocatable) --with-system-gdbinit=/etc/gdb/gdbinit --with-zlib --without

What happens if I use vector::begin() instead of std::back_inserter(vector) for output of set_intersection?

主宰稳场 提交于 2019-12-04 03:03:11
问题 I have been using the highly concise and intuitive C++ syntax for finding the intersection of two sorted vector s and putting the result in a third vector : vector<bar> a,b,c; //... std::set_intersection(a.begin(),a.end(),b.begin(),b.end(), std::back_inserter(c)); This should set c to intersection( a , b ), assuming a and b are sorted. But what if I just use c.begin() (I thought I saw an example somewhere of this, which is why I did): std::set_intersection(a.begin(),a.end(),b.begin(),b.end(),