大约有 47,000 项符合查询结果(耗时:0.0610秒) [XML]

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How do I move to end of line in Vim?

I know how to generally move around in command mode, specifically, jumping to lines, etc. But what is the command to jump to the end of the line that I am currently on? ...
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How to delete or add column in SQLITE?

...upports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. It is not possible to rename a column, remove a column, or add or remove constraints from a table. You can: create new table as the one you ar...
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What's the better (cleaner) way to ignore output in PowerShell? [closed]

...ad and > $null has about a 0.3% overhead. Addendum 2017-10-16: I originally overlooked another option with Out-Null, the use of the -inputObject parameter. Using this the overhead seems to disappear, however the syntax is different: Out-Null -inputObject ($(1..1000) | ?{$_ -is [int]}) And no...
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Does Python optimize tail recursion?

...tracebacks: Tail Recursion Elimination (2009-04-22) Final Words on Tail Calls (2009-04-27) You can manually eliminate the recursion with a transformation like this: >>> def trisum(n, csum): ... while True: # Change recursion to a while loop ... if n == 0:...
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How can I use numpy.correlate to do autocorrelation?

...olution, C(t)=∑ -∞ < i < ∞ aivt+i where -∞ < t < ∞, allows for results from -∞ to ∞, but you obviously can't store an infinitely long array. So it has to be clipped, and that is where the mode comes in. There are 3 different modes: full, same, & valid: "full" mode r...
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Printing without newline (print 'a',) prints a space, how to remove?

... This will consume a bit of memory for the string, but only make a single call to print. Note that string concatenation using += is now linear in the size of the string you're concatenating so this will be fast. >>> for i in xrange(20): ... s += 'a' ... >>> print s aaaaaaaaaa...
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'uint32_t' identifier not found error

... On Windows I usually use windows types. To use it you have to include <Windows.h>. In this case uint32_t is UINT32 or just UINT. All types definitions are here: http://msdn.microsoft.com/en-us/library/windows/desktop/aa383751%28v=vs....
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target=“_blank” vs. target=“_new”

...or window when the user clicks on the link. Using target="_new" is technically invalid according to the specifications, but as far as I know every browser will behave the same way: it will search for a tab or window with the context name "_new" if a "_new" tab/window is found, then the URL is loa...
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How to make a class JSON serializable

...t;>> magic(f) '{"fname": "/foo/bar"}' In that case you can merely call json.dumps(f.__dict__). If you want more customized output then you will have to subclass JSONEncoder and implement your own custom serialization. For a trivial example, see below. >>> from json import JSONE...
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Differences between lodash and underscore [closed]

...h run in Node, Ringo, Rhino, Narwhal, PhantomJS, and browsers), better overall performance and optimizations for large arrays/object iteration, and more flexibility with custom builds and template pre-compilation utilities. Because Lo-Dash is updated more frequently than Underscore, a lodash unders...