大约有 33,000 项符合查询结果(耗时:0.0543秒) [XML]
How can I check if a View exists in a Database?
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Presumably one should put the name of the view being checked in the quotes? Otherwise this will never work :)
– Reversed Engineer
Aug 21 '17 at 12:54
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List of strings to one string
... faster, didn't realize just how much faster. It makes sense though, it's done in unsafe code using pointers, so..... makes sense.
– BFree
Nov 25 '08 at 21:01
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Where can I learn how to write C code to speed up slow R functions? [closed]
...d Use the source, Luke! --- R itself has plenty of (very efficient) C code one can study, and CRAN has hundreds of packages, some from authors you trust. That provides real, tested examples to study and adapt.
But as Josh suspected, I lean more towards C++ and hence Rcpp. It also has plenty of exa...
change cursor to finger pointer
...ointer pointer cursor will disappear/default to the standard pointer after one click interaction. Good post Scott, thank you.
– Nubtacular
Jun 4 '15 at 13:06
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How can I get list of values from dict?
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There should be one ‒ and preferably only one ‒ obvious way to do it.
Therefore list(dictionary.values()) is the one way.
Yet, considering Python3, what is quicker?
[*L] vs. [].extend(L) vs. list(L)
small_ds = {x: str(x+42) for x in...
Delete fork dependency of a GitHub repository
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On this page, "Commit was made in a fork" paragraph, it is explained that one has to go through support to switch. Therefore, it is likely that there is no way to do that by yourself (unless you destroy and recreate your repo which is explained before... if you do so be careful if you have tickets ...
Convert JS date time to MySQL datetime
Does anyone know how to convert JS dateTime to MySQL datetime? Also is there a way to add a specific number of minutes to JS datetime and then pass it to MySQL datetime?
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Set the absolute position of a view
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rl.addView(iv, params);
More examples:
Places two 30x40 ImageViews (one yellow, one red) at (50,60) and (80,90), respectively:
RelativeLayout rl = (RelativeLayout) findViewById(R.id.my_relative_layout);
ImageView iv;
RelativeLayout.LayoutParams params;
iv = new ImageView(this);
iv.setBackgr...
Datatable vs Dataset
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One major difference is that DataSets can hold multiple tables and you can define relationships between those tables.
If you are only returning a single result set though I would think a DataTable would be more optimized. I...
How to Correctly Use Lists in R?
...ate the 'switch' statement in C++, Java, etc. in languages that don't have one; probably a good way to do this in R when i need to). +1
– doug
Jan 12 '10 at 23:30
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