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What database does Google use?
...vers.
Many projects at Google store data in
Bigtable, including web indexing,
Google Earth, and Google Finance.
These applications place very
different demands on Bigtable, both in
terms of data size (from URLs to web
pages to satellite imagery) and
latency requirements (from back...
Is Meyers' implementation of the Singleton pattern thread safe?
...exandrescu in Modern C++ Design. See Loki's site: loki-lib.sourceforge.net/index.php?n=Pattern.Singleton
– Matthieu M.
Nov 2 '09 at 14:57
1
...
Parse large JSON file in Nodejs
...cess the buffer
});
function pump() {
var pos;
while ((pos = buf.indexOf('\n')) >= 0) { // keep going while there's a newline somewhere in the buffer
if (pos == 0) { // if there's more than one newline in a row, the buffer will now start with a newline
buf = buf.slic...
Scatter plot and Color mapping in Python
...catter(x, y, c=t)
plt.show()
Here you are setting the color based on the index, t, which is just an array of [1, 2, ..., 100].
Perhaps an easier-to-understand example is the slightly simpler
import numpy as np
import matplotlib.pyplot as plt
x = np.arange(100)
y = x
t = x
plt.scatter(x, y, c=t...
How can I get the client's IP address in ASP.NET MVC?
... class HomeController : ClientController
{
public ActionResult Index()
{
string ip = Request.UserHostAddress;
...
}
}
}
Example: From within a helper class:
using System.Web;
namespace Mvc.Helpers
{
public static class HelperClass
...
How to conditionally push an item in an observable array?
...
An observableArray exposes an indexOf function (wrapper to ko.utils.arrayIndexOf). This allows you to do:
if (myObservableArray.indexOf(itemToAdd) < 0) {
myObservableArray.push(itemToAdd);
}
If the two are not actually a reference to the same obj...
Django migration strategy for renaming a model and relationship fields
... helpful. But a note - I also had to rename and/or remove PostgreSQL field indexes by hand because, after renaming Foo to Bar, I created a new model named Bar.
– Anatoly Scherbakov
Jun 7 '15 at 18:47
...
How to clone a case class instance and change just one field in Scala?
...ind a reference to copy in the "obvious" spots, scala-lang.org/api/current/index.html for instance.
– François Beausoleil
Aug 30 '11 at 20:38
6
...
淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...应的值，我们设计了两个column-family，即存放交易ID列表的index字段和原始交易明细的data字段。在存储的时候，我们有意识地让每个字段中的每一个元素都是定长的，这是为了支持通过偏移量快速地找到相应记录，避免复杂的查找...
Drawing a connecting line between two elements [closed]
... I need to put the svg at width and height 100% in background using z-index -1 but it works like a charm.
– steven
Mar 18 '16 at 23:15
...