大约有 40,000 项符合查询结果(耗时:0.0369秒) [XML]

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How to extract text from a PDF? [closed]

...t was then easy to write an app to strip out blank lines, etc, and suck in all 30,000 records. -dSIMPLE and -dCOMPLEX made no difference in this case. share | improve this answer | ...
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Convert string to variable name in JavaScript

...ontext. this is context, what it points to depends on how the function is called. In JS, 50% of the time this is window unless you enable strict mode and this becomes undefined and will throw an error. Scope is something completely different and it's not an object (except global scope which is mirro...
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What is a columnar database?

...an easy fashion). How do they differ from relational databases? They generally differ from traditional (row-oriented) databases with regards to ... performance... storage requirements ... ease of modification of the schema ... ...in specific use cases of DBMSes. In particular they offer advanta...
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How to make the hardware beep sound in Mac OS X 10.6

...ble hardware. Before most computers had sound cards, most machines had a small speaker or piezo buzzer connected to one of the channels of a timer chip. This could be used to generate simple tones or beeps. Even after many computers integrated sound cards, it remained common for quite some time for ...
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Pretty graphs and charts in Python [closed]

... Looks good, I'd like to try it. Any plan to make a windows installer for python 2.6? – monkut Oct 22 '08 at 5:03 ...
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Using JQuery - preventing form from submitting

...the same page, and it worked, still unsure what was wrong though, but it's all good now. thanks! – Lucy Weatherford Feb 19 '12 at 8:16 1 ...
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SQL Query to concatenate column values from multiple rows in Oracle

... (with tag E) extract the text of this aggregate the xml (concatenate it) call the resulting column "Result" share | improve this answer | follow | ...
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Cast to int vs floor

...dited Dec 30 '14 at 21:44 Matt Ball 323k8585 gold badges599599 silver badges672672 bronze badges answered Jul 21 '10 at 14:39 ...
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Convert String to Calendar Object in Java

I am new to Java, usually work with PHP. 8 Answers 8 ...
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Seeing escape characters when pressing the arrow keys in python shell

In shells like the interactive python shell, you can usually use the arrow keys to move around in the current line or get previous commands (with arrow-up) etc. ...