大约有 5,213 项符合查询结果（耗时：0.0408秒） [XML]
How do I copy a hash in Ruby?
I'll admit that I'm a bit of a ruby newbie (writing rake scripts, now). In most languages, copy constructors are easy to find. Half an hour of searching didn't find it in ruby. I want to create a copy of the hash so that I can modify it without affecting the original instance.
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Shell Script: Execute a python program from within a shell script
I've tried googling the answer but with no luck.
9 Answers
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Are HTML Image Maps still used?
Do people still use the old HTML Image Maps? The ones with:
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Replace a value in a data frame based on a conditional (`if`) statement
In the R data frame coded for below, I would like to replace all of the times that B
appears with b .
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Submit form using a button outside the tag
Say I have:
13 Answers
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How to avoid .pyc files?
Can I run the python interpreter without generating the compiled .pyc files?
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How do I render a partial of a different format in Rails?
I'm trying to generate a JSON response that includes some HTML. Thus, I have /app/views/foo/bar.json.erb :
11 Answers
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Windows recursive grep command-line
I need to do a recursive grep in Windows, something like this in Unix/Linux:
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What does “while True” mean in Python?
While WHAT is True?
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psql: FATAL: role “postgres” does not exist
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NOTE: If you installed postgres using homebrew, see the comment from @user3402754 below.
Note that the error message does NOT talk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing databas...