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MongoDB数据导出导入工具:mongoexport,mongoimport - 大数据 & AI - 清泛...

...个students集合,集合中数据如下: > db.students.find() { "_id" : ObjectId("5031143350f2481577ea81e5"), "classid" : 1, "age" : 20, "name" : "kobe" } { "_id" : ObjectId("5031144a50f2481577ea81e6"), "classid" : 1, "age" : 23, "name" : "nash" } { "_id" : ObjectId("5031145a50f2481577ea81...
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Email validation using jQuery

...ming more common this regex may need modifying .systems and .poker etc are all valid TLDs now but would fail the regex check – Liath Sep 5 '14 at 7:35 3 ...
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How do I concatenate two lists in Python?

... @Daniel it will create a new list with a shallow copy of the items in the first list, followed by a shallow copy of the items in the second list. Use copy.deepcopy to get deep copies of lists. – Daniel G Apr 19 '12 at 14:51 ...
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How to open a new tab using Selenium WebDriver?

...ow. Obviously, you'd need to keep track of the window name(s) as normal to allow switching between them. – Mark Rowlands Jul 16 '13 at 15:42 1 ...
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How is the undo tree used in Vim?

... See also :h undo-redo, which lists all the commands and their usage. There are two ways to traverse the undo tree. One is to go "back in time". g+ and g- will traverse all of the nodes in the tree in chronological or reverse-chronological order (which can...
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Why does @foo.setter in Python not work for me?

...operty def x(self): print 'called getter' return self._x @x.setter def x(self, value): print 'called setter' self._x = value It works: >>> k = testDec() >>> k.x called getter Traceback (most recent call last): File "<stdin>"...
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How to enable cURL in PHP / XAMPP

... On Debian with Apache 2: apt-get install php5-curl /etc/init.d/apache2 restart (php4-curl if it's php4) share | improve this answer | ...
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How can we match a^n b^n with Java regex?

...tion (?=…). Here is our pattern with a simple test harness: function testAll($r, $tests) { foreach ($tests as $test) { $isMatch = preg_match($r, $test, $groups); $groupsJoined = join('|', $groups); print("$test $isMatch $groupsJoined\n"); } } $tests = array('aaa', 'aaab',...
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AngularJS and its use of Dollar Variables

...="n = { visible: 'foo', $ignore: 'bar' };">{{ n }}</div> Additionally when adding an explicit watcher on a scope object, changes to properties with a leading dollar sign of this object will not trigger the watcher. See this updated fiddle. angular.equals() ignores keys prefixed with $. ...
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JSONP with ASP.NET Web API

...ms to be ok, but because the service exists on a separate site, trying to call it with JQuery errors with the "Not Allowed". So, this is clearly a case where I need to use JSONP. ...