大约有 16,000 项符合查询结果(耗时:0.0349秒) [XML]

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How can I parse a CSV string with JavaScript, which contains comma in data?

I have the following type of string 17 Answers 17 ...
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PostgreSQL “DESCRIBE TABLE”

How do you perform the equivalent of Oracle's DESCRIBE TABLE in PostgreSQL (using the psql command)? 22 Answers ...
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dplyr: “Error in n(): function should not be called directly”

I am attempting to reproduce one of the examples in the dplyr package but am getting this error message. I am expecting to see a new column n produced with the frequency of each combination. What am I missing? I triple checked that the package is loaded. ...
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cleanest way to skip a foreach if array is empty [duplicate]

Not a major problem but I was wondering if there is a cleaner way to do this. It would be good to avoid nesting my code with an unnecessary if statement. If $items is empty php throws an error. ...
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Why should a Java class implement comparable?

Why is Java Comparable used? Why would someone implement Comparable in a class? What is a real life example where you need to implement comparable? ...
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What is a semaphore?

... a programming concept that is frequently used to solve multi-threading problems. My question to the community: 14 Answer...
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How to thoroughly purge and reinstall postgresql on ubuntu? [closed]

Somehow I've managed to completely bugger the install of postgresql on Ubuntu karmic. I want to start over from scratch, but when I "purge" the package with apt-get it still leaves traces behind such that the reinstall configuration doesn't run properly. ...
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Find and Replace text in the entire table using a MySQL query

Usually I use manual find to replace text in a MySQL database using phpmyadmin. I'm tired of it now, how can I run a query to find and replace a text with new text in the entire table in phpmyadmin? ...
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Bower: ENOGIT Git is not installed or not in the PATH

Git is installed and is in the path. 16 Answers 16 ...
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Bash script absolute path with OS X

I am trying to obtain the absolute path to the currently running script on OS X. 15 Answers ...