大约有 10,158 项符合查询结果（耗时：0.0215秒） [XML]
PowerShell equivalent to grep -f
I'm looking for the PowerShell equivalent to grep --file=filename . If you don't know grep , filename is a text file where each line has a regular expression pattern you want to match.
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Get table column names in MySQL?
Is there a way to grab the columns name of a table in mysql?
using php
19 Answers
19
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How to install PostgreSQL's pg gem on Ubuntu?
I'm trying to install PostgreSQL's pg gem for Ruby.
19 Answers
19
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Is there shorthand for returning a default value if None in Python? [duplicate]
In C#, I can say x ?? "" , which will give me x if x is not null, and the empty string if x is null. I've found it useful for working with databases.
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SQLite: How do I save the result of a query as a CSV file?
I'm new to SQLite. Is there a way I can export the results of a query into a CSV file?
6 Answers
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SQL Server 2008 can't login with newly created user
I'm using using Windows Vista and I'm having trouble logging in with a newly created user.
4 Answers
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What does map(&:name) mean in Ruby?
I found this code in a RailsCast :
16 Answers
16
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What is the advantage to using bloom filters?
I am reading up on bloom filters and they just seem silly. Anything you can accomplish with a bloom filter, you could accomplish in less space, more efficiently, using a single hash function rather than multiple, or that's what it seems. Why would you use a bloom filter and how is it useful?
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How to find whether or not a variable is empty in Bash
How can I check if a variable is empty in Bash?
10 Answers
10
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How to wrap text using CSS? [duplicate]
How do I get text like this to wrap in CSS?
5 Answers
5
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