大约有 23,000 项符合查询结果（耗时：0.0417秒） [XML]
Selecting a row of pandas series/dataframe by integer index
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To index-based access to the pandas table, one can also consider numpy.as_array option to convert the table to Numpy array as
np_df = df.as_matrix()
and then
np_df[i]
would work.
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Function Pointers in Java
... slow, but I believe that reflection allows to do stuff that the interface-based solution in the accepted answer cannot do (unless I'm mistaken), namely call various methods of the same object within the same code portion.
– Eusebius
Apr 9 '14 at 6:50
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How to define an enum with string value?
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You can't, because enum can only be based on a primitive numeric type.
You could try using a Dictionary instead:
Dictionary<String, char> separators = new Dictionary<string, char>
{
{"Comma", ','},
{"Tab", '\t'},
{"Space", ' '},
};
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Mocking vs. Spying in mocking frameworks
...me shortcut which makes them not suitable for production (an in memory database is a good example).
Stubs provide canned answers to calls made during the test, usually not responding at all to anything outside what's programmed in for the test.
Spies are stubs that also record some information based...
Adding elements to object
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thank you again! But my base data is object type cause of the "cart = JSON.parse(jsonfile)" on the beginning.. i don't think i should take the json as a object, convert it to array, add element, stringify..
– HypeZ
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Simulating Slow Internet Connection
...know this is kind of an odd question. Since I usually develop applications based on the "assumption" that all users have a slow internet connection. But, does anybody think that there is a way to programmatically simulate a slow internet connection, so I can "see" how an application performs under v...
How to stop an animation (cancel() does not work)
... to stop an animation, it exposed as public method in
View.java, it is the base class for all widgets, which are used to create interactive UI components (buttons, text fields, etc.).
/**
* Sets the next animation to play for this view.
* If you want the animation to play immediately, use
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Lightweight Javascript DB for use in Node.js [closed]
Anybody know of a lightweight yet durable database, written in Javascript, that can be used with Node.js.
11 Answers
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How to exit from PostgreSQL command line utility: psql
... Ctrl+Z was the only command that worked for me - I was connected to a database via tunnel which lost the connection - neither \q nor Ctrl+D worked, but I could Ctrl+Z and then kill the suspended process
– Sergey
Apr 5 '18 at 23:02
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CSS3 Spin Animation
...n IE11 there's no need for -ms/-moz/-webkit prefix.
Here's a shorter code (based on previous answers):
div {
margin: 20px;
width: 100px;
height: 100px;
background: #f00;
/* The animation part: */
animation-name: spin;
animation-duration: 4000ms;
animation-iteration-...