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Why is LINQ JOIN so much faster than linking with WHERE?
...a Where condition actually performs a cartesian product of all the tables, then filters the rows that satisfy the condition. This means the Where condition is evaluated for each combination of rows (n1 * n2 * n3 * n4)
The Join operator takes the rows from the first tables, then takes only the rows w...
Handling very large numbers in Python
...) supports an arbitrarily large float !!
If you need one big, large, float then check up on the decimal Module. There are examples of use on these foruns: OverflowError: (34, 'Result too large')
Another reference: http://docs.python.org/2/library/decimal.html
You can even using the gmpy module if yo...
Using SSH keys inside docker container
...ory.
The solution I found is to add your keys using the --build-arg flag. Then you can use the new experimental --squash command (added 1.13) to merge the layers so that the keys are no longer available after removal. Here's my solution:
Build command
$ docker build -t example --build-arg ssh_prv...
Datatables: Cannot read property 'mData' of undefined
...figuration which I'm aware of, but if you do not provide a custom config, then it defaults to convention which my answer addresses
– Moses Machua
Jun 28 '17 at 15:15
1
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项目管理实践【五】自动编译和发布网站【Using Visual Studio with Source ...
...解一下怎么使用MSBuild+WebDeployment+Robocopy自动编译过和部署ASP.NET网站。
首先安装下面的三个软件:
1.MSBuild.Community.Tasks下载：
http://msbuildtasks.tigris.org/files/documents/3383/28296/MSBuild.Community.Tasks.msi
源代码：
http://msbuildtasks.tigris.org/fi...
What is the difference between D3 and jQuery?
... it is a bad comparison now, but as of 2013 it wasn't that bad. Since then, jQuery has dropped a lot of polyfilling for older browsers (data attributes was one of them) while D3 has stopped being a monolithyc library and became instead an entrypoint for a collection of smaller specific librarie...
Optimal number of threads per core
...ory intensive work (read source 1, read source 2, fast computation, write) then having more threads doesn't help. Again, this depends on how much data you read/write simultaneously (i.e. if you use SSE 4.2 and read 256 bits values, that stops all threads in their step... in other words, 1 thread is ...
“unpacking” a tuple to call a matching function pointer
...urn call_helper(func,params,std::index_sequence_for<Args...>{}); }
Then our delayed dispatch becomes
template <typename ...Args>
struct save_it_for_later
{
std::tuple<Args...> params;
std::function<void(Args...)> func;
void delayed_dispatch()
{ std::call(func,param...
How to define two angular apps / modules in one page?
...ons (each of which can use one or more modules) on the same page/document, then you'll need to manually bootstrap each of them -- don't use ng-app (because it won't work). ng-app can only be used once per HTML document. It is really just a short-cut if you only have one app on the page, which is t...
Get all child views inside LinearLayout at once
...content));// you can use this in an Activity to get your layout root view, then pass it to findAllEdittexts() method below.
Here I am iterating only EdiTexts, if you want all Views you can replace EditText with View.
SparseArray<EditText> array = new SparseArray<EditText>();
private ...