大约有 47,000 项符合查询结果（耗时：0.0646秒） [XML]
Update all values of a column to lowercase
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edited Oct 5 '18 at 8:29
answered May 28 '11 at 9:53
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How to vertically align elements in ?
...-cell and display:table-row like so:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<style typ...
Why does “_” (underscore) match “-” (hyphen)?
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edited Mar 23 '18 at 2:35
answered Nov 23 '11 at 3:02
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How to count the number of true elements in a NumPy bool array
...l ~12x faster.
– mab
Nov 23 '15 at 18:15
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How to enable C++11 in Qt Creator?
...FLAGS += -std=c++11 (or QMAKE_CXXFLAGS += -std=c++0x)
also work with Qt 4.8 and gcc / clang.
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Regular expression to return text between parenthesis
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258
If your problem is really just this simple, you don't need regex:
s[s.find("(")+1:s.find(")")]
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Matplotlib - Move X-Axis label downwards, but not X-Axis Ticks
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HYRYHYRY
78.9k2020 gold badges157157 silver badges168168 bronze badges
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Specify custom Date format for colClasses argument in read.table/read.csv
...e", function(from) as.Date(from, format="%d/%m/%Y") )
tmp <- c("1, 15/08/2008", "2, 23/05/2010")
con <- textConnection(tmp)
tmp2 <- read.csv(con, colClasses=c('numeric','myDate'), header=FALSE)
str(tmp2)
Then modify if needed to work for your data.
Edit ---
You might want to run setCl...
Ignoring time zones altogether in Rails and PostgreSQL
...es in PostgreSQL
Internal storage and epoch
Internally, timestamps occupy 8 bytes of storage on disk and in RAM. It is an integer value representing the count of microseconds from the Postgres epoch, 2000-01-01 00:00:00 UTC.
Postgres also has built-in knowledge of the commonly used UNIX time counti...
Access an arbitrary element in a dictionary in Python
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answered Jun 22 '10 at 23:28
doublepdoublep
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