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How to 'insert if not exists' in MySQL?
...accomplish what is
expected using existing functionality.
There are 3 possible solutions: using INSERT IGNORE, REPLACE, or
INSERT … ON DUPLICATE KEY UPDATE.
Imagine we have a table:
CREATE TABLE `transcripts` (
`ensembl_transcript_id` varchar(20) NOT NULL,
`transcript_chrom_start` i...
Why is char[] preferred over String for passwords?
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4364
Strings are immutable. That means once you've created the String, if another process can dump ...
PHP - Get key name of array value
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341
If you have a value and want to find the key, use array_search() like this:
$arr = array ('fi...
Rails 3.1 and Image Assets
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In 3.1 you just get rid of the 'images' part of the path. So an image that lives in /assets/images/example.png will actually be accessible in a get request at this url - /assets/example.png
Because the assets/images folder gets...
How to split a string into an array of characters in Python?
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13 Answers
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How to sort a list of strings numerically?
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13 Answers
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Clone Object without reference javascript [duplicate]
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Torxed
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answered Oct 2 '12 at 12:23
Armel LarcierArmel ...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
...的例程。此代码经过验证，能在不用修改的情况下在 gcc-3.4.4 和 cl-13.10.3077 上成功编译。
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了解 Boost path 对象
了解 Boost Filesystem Library 的关键是 path 对象，因为 Filesystem Library 中定义的多个例程都要对相应的 path 对象操...
How to draw circle in html page?
How do you draw a circle using HTML5 and CSS3?
16 Answers
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Is there a string math evaluator in .NET?
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You could add a reference to Microsoft Script Control Library (COM) and use code like this to ev...