大约有 5,600 项符合查询结果(耗时:0.0289秒) [XML]

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How to add a string to a string[] array? There's no .Add function

...s how I add to a string when needed: string[] myList; myList = new string[100]; for (int i = 0; i < 100; i++) { myList[i] = string.Format("List string : {0}", i); } share | improve this ans...
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How to speed up insertion performance in PostgreSQL

... the same issue today. Inserts go at a 'regular' speed (less than 3sec per 100K) up until to 5MI (out of total 30MI) rows and then the performance sinks drastically (all the way down to 1min per 100K). I will not list all of the things that did not work and cut straight to the meat. I dropped a ...
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Remove the last character in a string in T-SQL?

... e.g. DECLARE @String VARCHAR(100) SET @String = 'TEST STRING' -- Chop off the end character SET @String = CASE @String WHEN null THEN null ELSE ( CASE LEN(@String) WHEN 0 THEN @String ELSE LEFT(@String, LEN(@String) - 1...
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How to count instances of character in SQL Column

I have an sql column that is a string of 100 'Y' or 'N' characters. For example: 16 Answers ...
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How to position a div in the middle of the screen when the page is bigger than the screen

... bottom: 0; left: 0; right: 0; width: 200px; height: 100px; margin: auto; background-color: #f3f3f3;">Full Center ON Page </div> share | improve this ...
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Can I create a named default constraint in an add column statement in SQL Server?

...be unique (results in a unique index implicitly) ,SomeUniqueString VARCHAR(100) NOT NULL CONSTRAINT UQ_TestTable_SomeUniqueString UNIQUE --define two constraints, one for a default value and one for a value check ,SomeNumber INT NULL CONSTRAINT DF_TestTable_SomeNumber DEFAULT (0) ...
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How to see full query from SHOW PROCESSLIST

When I issue SHOW PROCESSLIST query, only first 100 characters of the running SQL query are returned in the info column. 5 ...
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How to store arrays in MySQL?

...third table is the link table between Person and Fruit. So if a person has 100 fruits. I need to create 100 rows in the third table, right? Is this efficient? – tonga Jun 28 '13 at 19:11 ...
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How to drop columns by name in a data frame

...y) ), times=5000) plt <- ggplot2::qplot(y=time, data=res[res$time < 1000000,], colour=expr) plt <- plt + ggplot2::scale_y_log10() + ggplot2::labs(colour = "expression") + ggplot2::scale_color_discrete(labels = c("re_assign", "null_assign", "subset_bool", "subset_names", "subset_drop"...
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Can jQuery provide the tag name?

...don't just have a small selection of possible tags, but it could be any of 100+ html tags. Then you'd need to write: $(this).is('sometag') a 100+ times. I assume this is why some people downvoted your answer. – ximi Mar 1 '12 at 20:09 ...