大约有 46,000 项符合查询结果(耗时:0.0533秒) [XML]

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What should every developer know about databases? [closed]

...fluence that choice; The concept of coverage (why you shouldn't just write SELECT *); The difference between a clustered and non-clustered index; Why more/bigger indexes are not necessarily better; Why you should try to avoid wrapping filter columns in functions. Designers should also be aware of ...
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UIButton title text color

... I want a UIButton to be displayed as highlighted: - (void)changeColorAsUnselection{ [self setTitleColor:[UIColor colorFromHexString:acColorGreyDark] forState:UIControlStateNormal & UIControlStateSelected & UIControlState...
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Oracle TNS names not showing when adding new connection to SQL Developer

... Restart SQL Developer Now in SQL Developer right click on Connections and select New Connection.... Select TNS as connection type in the drop down box. Your entries from tnsnames.ora should now display here. share ...
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XAMPP, Apache - Error: Apache shutdown unexpectedly

...- From the XAMPP Control Panel, under Apache, click the Config button, and select the Apache (httpd.conf). Inside the httpd.conf file, somehow I found a line that says: Listen 80 And change the 80 into any number / port you want. In my scenario I’m using port 8080. Listen 8080 Still from th...
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Intellij shortcut to convert code to upper or lower case?

... I have trouble where sometimes pressing CTRL+SHIFT+U just replaces the selected text with the letter U.... sometimes it works, but usually it just does the replacing. – Trenton Jul 31 '14 at 16:15 ...
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disable nganimate for some elements

...ng-show , etc, are affected by that, I want to leverage ngAnimate for some selected elements. For performance and some bugs in elements that shows and hide very speedy. ...
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How to change the CHARACTER SET (and COLLATION) throughout a database?

...re schema to utf8. Hope this helps! -- Change DATABASE Default Collation SELECT DISTINCT concat('ALTER DATABASE `', TABLE_SCHEMA, '` CHARACTER SET utf8 COLLATE utf8_unicode_ci;') from information_schema.tables where TABLE_SCHEMA like 'database_name'; -- Change TABLE Collation / Char Set SELECT...
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Convert columns to string in Pandas

...cated dtype. object dtype breaks dtype-specific operations like DataFrame.select_dtypes(). There isn’t a clear way to select just text while excluding non-text but still object-dtype columns. When reading code, the contents of an object dtype array is less clear than 'string'. See also the se...
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How do CUDA blocks/warps/threads map onto CUDA cores?

...rpSize - 1) / WarpSize There is no requirement for the warp schedulers to select two warps from the same thread block. 7'. An execution unit will not stall on a memory operation. If a resource is not available when an instruction is ready to be dispatched the instruction will be dispatched again i...
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Is there a query language for JSON?

...joined items .equals("location.state", "TX") //and even do custom selections .select(function(rec) { return { fullname : rec.firstname + " " + rec.lastname, city : rec.location.city, ageInTenYears : (rec.age + 10) }; }); It's ful...