大约有 47,000 项符合查询结果(耗时:0.0471秒) [XML]

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Secondary axis with twinx(): how to add to legend?

I have a plot with two y-axes, using twinx() . I also give labels to the lines, and want to show them with legend() , but I only succeed to get the labels of one axis in the legend: ...
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PDO Prepared Inserts multiple rows in single query

I am currently using this type of SQL on MySQL to insert multiple rows of values in one single query: 22 Answers ...
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Does Ruby have a string.startswith(“abc”) built in method?

Does Ruby have a some_string.starts_with("abc") method that's built in? 4 Answers 4 ...
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Splitting String with delimiter

I am currently trying to split a string 1128-2 so that I can have two separate values. For example, value1: 1128 and value2: 2, so that I can then use each value separately. I have tried split() but with no success. Is there a specific way Grails handles this, or a better way of doing it? ...
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Bash history without line numbers

The bash history command is very cool. I understand why it shows the line numbers, but is there a way I can invoke the history command and suppress the line numbers? ...
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How to pipe input to a Bash while loop and preserve variables after loop ends

Bash allows to use: cat <(echo "$FILECONTENT") 3 Answers 3 ...
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python numpy ValueError: operands could not be broadcast together with shapes

In numpy, I have two "arrays", X is (m,n) and y is a vector (n,1) 6 Answers 6 ...
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How to automatically generate a stacktrace when my program crashes

I am working on Linux with the GCC compiler. When my C++ program crashes I would like it to automatically generate a stacktrace. ...
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Switch statement for greater-than/less-than

so I want to use a switch statement like this: 10 Answers 10 ...
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How to show SQL queries run in the Rails console?

When I run queries (e.g. MyModel.where(...) or record.associated_things ) in the console, how can I see the actual database queries being run so I can gain more understanding of what is happening? ...