大约有 47,000 项符合查询结果(耗时:0.0649秒) [XML]

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Is there a way to automate the android sdk installation?

Now I have to download and install the Android SDK and AVD Manager, and then install the APIs, tools through the UI. Is there a way to automate this process? ...
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What is the purpose of setting a key in data.table?

I am using data.table and there are many functions which require me to set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables. ...
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Combining C++ and C - how does #ifdef __cplusplus work?

...convert the legacy code, as well. I'm a little confused about how the C and C++ interact. I understand that by wrapping the C code with extern "C" the C++ compiler will not mangle the C code's names, but I'm not entirely sure how to implement this. ...
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Get loop counter/index using for…of syntax in JavaScript

I understand that the basic for…in syntax in JavaScript looks like this: 11 Answers ...
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Measure the time it takes to execute a t-sql query

...asuring the "elapsed time" between events is to just grab the current date and time. In SQL Server Management Studio SELECT GETDATE(); SELECT /* query one */ 1 ; SELECT GETDATE(); SELECT /* query two */ 2 ; SELECT GETDATE(); To calculate elapsed times, you could grab those date values into var...
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Reading a huge .csv file

...ying to read data from .csv files in Python 2.7 with up to 1 million rows, and 200 columns (files range from 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this: ...
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How can I use if/else in a dictionary comprehension?

...ntioning that you don't need to have an if-else condition for both the key and the value. For example, {(a if condition else b): value for key, value in dict.items()} will work. – Jeremy Weirich Jul 26 '16 at 19:41 ...
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Javascript set img src

... a dynamically generated page. So the obvious thing to do is to preload it and use that one variable as the source all the time. ...
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How do I make a simple makefile for gcc on Linux?

I have three files: program.c , program.h and headers.h . 5 Answers 5 ...
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Analytics Google API Error 403: “User does not have any Google Analytics Account”

... This is the best answer, I tried it and it works like charm!! Thanks a lot @Sebastian! – mongotop Nov 1 '12 at 14:03 1 ...