大约有 37,000 项符合查询结果（耗时：0.0348秒） [XML]
Use '=' or LIKE to compare strings in SQL?
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Woops... okay, I took the point. Table with ~600 entries, 10 digit number as comparing field: Equal is 20 to 30 times faster!
– guerda
Feb 5 '09 at 8:54
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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...
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 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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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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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 ...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
...refix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp
To set up base tables in another folder, or use a different user to run
mysqld, view the help for mysql_install_db:
mysql_install_db --help
and view the MySQL documentation:
* http://dev.mysql.com/doc/refman/5.5/en/mysql-install-db.h...
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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What is the function of the DBMDL File in VS database project
...d a <project name>.dbmdl file. But at some point after I added some tables and built the project, the <project name>.dbmdl file disappeared. I seem to be able to carry on without it. Good to know it is not something to submit to source control.
– Mike Finch
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