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Dump a NumPy array into a csv file
...ne
with open('example.csv', 'w') as fp:
fp.write('''\
col1,col2,col3
1,100.1,string1
2,222.2,second string
''')
# Read it as a Numpy record array
ar = np.recfromcsv('example.csv')
print(repr(ar))
# rec.array([(1, 100.1, 'string1'), (2, 222.2, 'second string')],
# dtype=[('col1', '<...
How to wait until an element exists?
... clearInterval(existCondition);
doTheRestOfTheStuff(parameters);
}
}, 100); // check every 100ms
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Efficient paging in SQLite with millions of records
...T *
FROM MyTable
WHERE SomeColumn > LastValue
ORDER BY SomeColumn
LIMIT 100;
(This is explained with more detail on the SQLite wiki.)
When you have multiple sort columns (and SQLite 3.15 or later), you can use a row value comparison for this:
SELECT *
FROM MyTable
WHERE (SomeColumn, OtherColu...
HTML5 Video Dimensions
...
I am getting values of 100 for both width and height, and video doesn't have 100px. Not sure why...
– Mikel
Jul 22 '15 at 9:14
2...
Are the decimal places in a CSS width respected?
...ory and used for subsequent child calculation. For example, if your box of 100.4999px paints to 100px, it's child with a width of 50% will be calculated as .5*100.4999 instead of .5*100. And so on to deeper levels.
I've created deeply nested grid layout systems where parents widths are ems, and chi...
Replace whole line containing a string using Sed
...{FILE}"
sed -i '/'"${OLD_LINE_PATTERN}"'/{s/.*/'"${NEW}"'/;h};${x;/./{x;q100};x}' "${FILE}"
if [[ $? -ne 100 ]] && [[ ${NEW_LINE} != '' ]]
then
echo "${NEW_LINE}" >> "${FILE}"
fi
}
the crazy exit status magic comes from https://stackoverflow.com/a/12145797/1262663
...
Sample random rows in dataframe
...slightly faster I believe: library(microbenchmark);microbenchmark( sample( 10000, 100 ), sample.int( 10000, 100 ), times = 10000 )
– Ari B. Friedman
Nov 1 '14 at 15:04
...
Upgrade python in a virtualenv
...
+100
Did you see this? If I haven't misunderstand that answer, you may try to create a new virtualenv on top of the old one. You just nee...
How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
...HAR(13) where you want your line break.
Example:
DECLARE @text NVARCHAR(100)
SET @text = 'This is line 1.' + CHAR(13) + 'This is line 2.'
SELECT @text
This prints out the following:
This is line 1.
This is line 2.
...
马化腾给创业者的3点建议：行业跨界领域最有机会诞生创新 - 资讯 - 清泛网 ...
...结出硕果的一个最好的典范。大疆科技现在市值已经超过100亿美元，也就是一个超级独角兽。我前几天带了一个国内同学会的团队，也去参观大疆。他们最新的科产品经能够成功规避视觉的障碍，并有下一代产品。我期待他们的...