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++someVariable vs. someVariable++ in JavaScript
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How do I find out if first character of a string is a number?
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260
Character.isDigit(string.charAt(0))
Note that this will allow any Unicode digit, not just 0-9...
How is “int* ptr = int()” value initialization not illegal?
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answered Nov 9 '11 at 16:14
Jerry CoffinJerry Coffin
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Scaling Node.js
...e are some benchmarks from redis when used with hiredis.
PING: 20000 ops 46189.38 ops/sec 1/4/1.082
SET: 20000 ops 41237.11 ops/sec 0/6/1.210
GET: 20000 ops 39682.54 ops/sec 1/7/1.257
INCR: 20000 ops 40080.16 ops/sec 0/8/1.242
LPUSH: 20000 ops 41152.26 ops/sec 0/3/1.212
LRANGE (10 elements): 20000 ...
Where can I find a NuGet package for upgrading to System.Web.Http v5.0.0.0?
...="System.Web.Http, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\packages\Microsoft.AspNet.WebApi.Core.5.0.0\lib\net45\System.Web.Http.dll</HintPath>
</Reference&...
how does array[100] = {0} set the entire array to 0?
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164
It's not magic.
The behavior of this code in C is described in section 6.7.8.21 of the C spec...
Find the max of two or more columns with pandas
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edited Dec 4 '16 at 19:06
alfredocambera
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answered A...
Convert columns to string in Pandas
...r keys to strings):
In [11]: df = pd.DataFrame([['A', 2], ['A', 4], ['B', 6]])
In [12]: df.to_json()
Out[12]: '{"0":{"0":"A","1":"A","2":"B"},"1":{"0":2,"1":4,"2":6}}'
In [13]: df[0].to_json()
Out[13]: '{"0":"A","1":"A","2":"B"}'
Note: you can pass in a buffer/file to save this to, along with s...
Can dplyr package be used for conditional mutating?
...G. GrothendieckG. Grothendieck
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How do you plot bar charts in gnuplot?
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If you want to do multiple bars for each entry:
data.dat:
0 5
0.5 6
1.5 3
2 7
3 8
3.5 1
gnuplot:
set xtics ("label" 0.25, "label2" 1.75, "bar label" 3.25,)
set boxwidth 0.5
set style fill solid
plot 'data.dat' every 2 using 1:2 with boxes ls 1,\
'data.dat' every...