大约有 40,000 项符合查询结果(耗时:0.0377秒) [XML]

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How to drop into REPL (Read, Eval, Print, Loop) from Python code

Is there a way to programmatically force a Python script to drop into a REPL at an arbitrary point in its execution, even if the script was launched from the command line? ...
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How do you determine which backend is being used by matplotlib?

Either interactively, such as from within an Ipython session, or from within a script, how can you determine which backend is being used by matplotlib? ...
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Haskell export current module with additional imported module

Is it possible to write a module in Haskell, which re-exports a module in addition to exporting everything visible inside? ...
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How to conditionally push an item in an observable array?

...rray , but only if the item is not already present. Is there any "find" function or recommended pattern for achieving this in KnockoutJS? ...
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MySQL - How to select data by string length

Is there a MySQL function to do this (of course instead of string_length )? 6 Answers ...
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What's the 'environment' task in Rake?

According to " Custom Rake Tasks ": 3 Answers 3 ...
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Escaping keyword-like column names in Postgres

If the column in Postgres' table has the name year , how should look INSERT query to set the value for that column? 3 An...
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How can I suppress column header output for a single SQL statement?

I'm executing some SQL statements in batch (using the mysql command-line binary). I want one of my several SELECT statements to not print the column headers, just the selected records. Is this possible? ...
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Order data frame rows according to vector with specific order

Is there an easier way to ensure that a data frame's rows are ordered according to a "target" vector as the one I implemented in the short example below? ...
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cancelling queued performSelector:afterDelay calls

does anybody know if it is possible to cancel already queued selector events from the event stack or timer stack (or whatever mechanism it is that is utilized by the API) when you call performSelector:withObject:afterDelay ? ...