大约有 37,000 项符合查询结果（耗时：0.0431秒） [XML]
How do you kill all current connections to a SQL Server 2005 database?
...the time that you are looping over the active connections new one can be established, and you'll miss those. You could instead use the following approach which does not have this drawback:
-- set your current connection to use master otherwise you might get an error
use master
ALTER DATABASE YourD...
How to strip all whitespace from string
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@Roger Pate: You don't need the 'table' argument for translate, it can be None -- although, surprisingly, that makes it slower...
– martineau
Sep 18 '10 at 19:31
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Window.open and pass parameters by post method
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Thanks for reply. But I have a table, where in column are buttons. When I click this button, I open new page and pass some parameters. So I have to write function, and for each button call it and pass fixed arguments. My question, how could I rewrite Your...
max value of integer
... of the value (otherwise it is reserved for the sign bit).
Here's a short table of the possible values for the possible data types:
width minimum maximum
signed 8 bit -128 +127
signed 16 bi...
Can't subtract offset-naive and offset-aware datetimes
...imezone aware timestamptz field in PostgreSQL. When I pull data from the table, I then want to subtract the time right now so I can get it's age.
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When should I use Struct vs. OpenStruct?
...g similar code as burtlo's, on Ruby 1.9.2, (1 of 4 cores x86_64, 8GB RAM) [table edited to align columns]:
creating 1 Mio Structs : 1.43 sec , 219 MB / 90MB (virt/res)
creating 1 Mio Class instances : 1.43 sec , 219 MB / 90MB (virt/res)
creating 1 Mio Hashes : 4.46 sec , 493 ...
How to bind function arguments without binding this?
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brings es6 to the table, still uses var :(
– Daniel Kobe
Nov 20 '16 at 3:47
7
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Remove all values within one list from another list? [duplicate]
...ime to find an item is linear, since a Python set is implemented as a hash table. Therefore, to remove an item of a set no time is spend locating the item, whereas in a list the item has to be found first.
– Guillem Cucurull
Aug 15 '18 at 21:24
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How to set the margin or padding as percentage of height of parent container?
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@zanerock I'm fairly certain that MDN compat table is outdated. For instance, it says that Safari needs the -webkit- prefix, but according to caniuse it hasn't required the prefix since Safari 11. Did you try it with any browser in which it didn't work?
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Drop unused factor levels in a subsetted data frame
...things up afterwards. Try the following before loading your data with read.table or read.csv:
options(stringsAsFactors = FALSE)
The disadvantage is that you're restricted to alphabetical ordering. (reorder is your friend for plots)
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