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How to split (chunk) a Ruby array into parts of X elements? [duplicate]
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Take a look at Enumerable#each_slice:
foo.each_slice(3).to_a
#=> [["1", "2", "3"], ["4", "5", "6"], ["7", "8", "9"], ["10"]]
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Getting only 1 decimal place [duplicate]
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Are you trying to represent it with only one digit:
print("{:.1f}".format(number)) # Python3
print "%.1f" % number # Python2
or actually round off the other decimal places?
round(number,1)
or even round strictly down?
math.floor(number*10)/10
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Linux日志切分工具：Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术
...aily/logrotate」：
#!/bin/sh
/usr/sbin/logrotate /etc/logrotate.conf
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
/usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0
实际运行时，Logrotate会调用配置文件「/etc/logrotate.conf」：
# see "m...
Can linux cat command be used for writing text to file?
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I use the following code to write raw text to files, to update my CPU-settings. Hope this helps out!
Script:
#!/bin/sh
cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor <<EOF
performance
EOF
cat > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor <<EOF
perfor...
python pandas dataframe to dictionary
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See the docs for to_dict. You can use it like this:
df.set_index('id').to_dict()
And if you have only one column, to avoid the column name is also a level in the dict (actually, in this case you use the Series.to_dict()):
df.set_index('id')['value'].to_dict()
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JS: Check if date is less than 1 hour ago?
...or adding hours to a date
Date.prototype.addHours= function(hrs){
this.setHours(this.getHours()+hrs);
return this;
}
Call function like this:
//test alert(new Date().addHours(4));
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Getting started with Haskell
...iece of advice I read not too long ago was that you should have a standard set of simple problems you know how to solve (in theory) and then whenever you try to learn a new language you implement those problems in that language.
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Expand Python Search Path to Other Source
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There are a few possible ways to do this:
Set the environment variable PYTHONPATH to a colon-separated list of directories to search for imported modules.
In your program, use sys.path.append('/path/to/search') to add the names of directories you want Python to searc...
Combine two or more columns in a dataframe into a new column with a new name
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8 Answers
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Pretty-Printing JSON with PHP
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Don't forget to set response Content-Type to application/json if you want browser to display pretty-printed JSON nicely.
– Pijusn
Nov 27 '15 at 18:20
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