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Drop unused factor levels in a subsetted data frame

... answered Nov 26 '10 at 11:37 Roman LuštrikRoman Luštrik 62k2222 gold badges138138 silver badges183183 bronze badges ...
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What exactly is Type Coercion in Javascript?

... answered Nov 11 '13 at 21:01 BarmarBarmar 548k4444 gold badges346346 silver badges446446 bronze badges ...
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What does ~~ (“double tilde”) do in Javascript?

...w this is the NOT of the NOT The number -43.2, for example is: -43.210 = 111111111111111111111111110101012 as a signed (two's complement) 32-bit binary number. (JavaScript ignores what is after the decimal point.) Inverting the bits gives: NOT -4310 = 000000000000000000000000001010102 = 4210 In...
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What's the difference between TRUNCATE and DELETE in SQL

...uncate prevents flashback to states prior to the operation. However, from 11gR2 the FLASHBACK ARCHIVE feature allows this, except in Express Edition Use of FLASHBACK in Oracle http://docs.oracle.com/cd/E11882_01/appdev.112/e41502/adfns_flashback.htm#ADFNS638 Privileges Variable Oracle Delete...
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Organizing a multiple-file Go project [closed]

...ME/projects $ go build mypack $ go test mypack Update: as of >= Go 1.11, the Module system is now a standard part of the tooling and the GOPATH concept is close to becoming obsolete. share | ...
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What is the best way to check for Internet connectivity using .NET?

... | edited Sep 9 '19 at 11:27 T.Todua 41.4k1515 gold badges181181 silver badges170170 bronze badges an...
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Can't ignore UserInterfaceState.xcuserstate

...| edited Apr 30 '17 at 18:11 Harris 6,68722 gold badges4848 silver badges4646 bronze badges answered Jul...
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Creating a dynamic choice field

... 11 There's built-in solution for your problem: ModelChoiceField. Generally, it's always worth try...
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how to create a Java Date object of midnight today and midnight tomorrow?

... answered Jul 27 '11 at 20:37 timaschewtimaschew 14.7k44 gold badges5252 silver badges7272 bronze badges ...
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SplitView like Facebook app on iPhone

... community wiki 19 revs, 11 users 49%NANNAV 2 ...