大约有 38,000 项符合查询结果（耗时：0.0394秒） [XML]
How to select rows from a DataFrame based on column values?
...sitional indexing (df.iloc[...])
Label indexing (df.xs(...))
df.query(...) API
Below I show you examples of each, with advice when to use certain techniques. Assume our criterion is column 'A' == 'foo'
(Note on performance: For each base type, we can keep things simple by using the pandas API or ...
Error handling in getJSON calls
... as you like there. Take a look at the docs for more detailed help: http://api.jquery.com/jQuery.ajax
– Luciano Costa
Jun 15 '11 at 12:36
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How can I create tests in Android Studio?
...hem to test the parts of your code that just need Java and not the Android APIs. (Sometimes you can make a fake API object to test more things locally. This is called a mocking. A mock Context is an example.)
Instrumented tests. These tests are run on a real device or in the emulator. That makes the...
Format date to MM/dd/yyyy in JavaScript [duplicate]
... If using angular, you may want to consider: docs.angularjs.org/api/ng/filter/date
– Soferio
Jan 5 '15 at 2:43
3
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Literal notation for Dictionary in C#?
...point out (but I might not recommend it). If your goal is to provide terse API usage, you could use anonymous objects.
var data = new { test1 = "val", test2 = "val2"};
The "data" variable is then of an "unspeakable" anonymous type, so you could only pass this around as System.Object. You could th...
What is a Java ClassLoader?
...life of applications developers easier everyday. This is done by providing APIs that simplify your life by allowing you to concentrate on business logic rather than implementation details of fundamental mechanisms. This is evident by the recent change of J2SE 1.5 to J2SE 5.0 in order to reflect the ...
Mapping composite keys using EF code first
...617(v=vs.113).aspx
2) How to add a composite unique key using EF 6 Fluent Api?
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Download a file from NodeJS Server using Express
...leSync? I'm using a static file in this example but I'll use this download api for any files, passing the name of it.
– Thiago Miranda de Oliveira
Sep 2 '11 at 20:33
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Get checkbox value in jQuery
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@Jawa Per api.jquery.com/checkbox-selector [type="checkbox"] has better performance in modern browsers than :checkbox.
– TrueWill
Jun 22 '15 at 12:53
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Is there any way to kill a Thread?
...peError("Only types can be raised (not instances)")
res = ctypes.pythonapi.PyThreadState_SetAsyncExc(ctypes.c_long(tid),
ctypes.py_object(exctype))
if res == 0:
raise ValueError("invalid thread id")
elif res != 1:
# "if...