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Why doesn't Haskell's Prelude.read return a Maybe?
...ersions floating around many codebases).
See also this discussion.
Personally, I use the version from the safe package.
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Detect if called through require or directly by command line
How can I detect whether my Node.JS file was called using SH: node path-to-file or JS: require('path-to-file') ?
5 Answers...
What's the most elegant way to cap a number to a segment? [closed]
...a-library" answer but just in case you're using Lodash you can use .clamp:
_.clamp(yourInput, lowerBound, upperBound);
So that:
_.clamp(22, -10, 10); // => 10
Here is its implementation, taken from Lodash source:
/**
* The base implementation of `_.clamp` which doesn't coerce arguments.
*
* ...
Pandas aggregate count distinct
...
How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "use...
How do I encode and decode a base64 string?
..., I'll agree that wrapping a deref error is definitely dubious (plus we're all slowly agreeing to the fact that null as a concept is a bit of a hack to begin with), but we can still see some effects otherwise: the parameter name given in the exception might not be correct if left unchecked.
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append new row to old csv file python
I am trying to add a new row to my old csv file. Basically, it gets updated each time I run the Python script.
7 Answers
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What does “WARN Could not determine content-length of response body.” mean and how to I get rid of i
...e to a future release of Ruby.
I'm using rails 3.2.0 on ruby 1.9.3-p0 installed through RVM as a single user. So the location in my case is:
~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/webrick/httpresponse.rb
The location of the file to be altered differs depending on the type of installation, R...
Does R have an assert statement as in python?
...ndition that will throw an error in your program. Here's an example:
Less_Than_8 = function(x) return(x < 8)
for (i in 1:10)
{
print(i)
stopifnot(Less_Than_8(i))
}
This will print the numbers 1 through 8, then print a message that says
Error: Less_Than_8(i) is not TRUE
It would be ni...
WCF：使用Array替代List - 更多技术 - 清泛网 - 专注IT技能提升
...在于SOAP消息如何生成：
对于List<byte>：
...
<s:Body u:Id="_0"
xmlns:u="http://docs.oasis-open.org/wss/2004/01/
oasis-200401-wss-wssecurity-utility-1.0.xsd">
<SendData xmlns="http://tempuri.org/">
<array
xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/...
WCF：使用Array替代List - 更多技术 - 清泛网 - 专注IT技能提升
...在于SOAP消息如何生成：
对于List<byte>：
...
<s:Body u:Id="_0"
xmlns:u="http://docs.oasis-open.org/wss/2004/01/
oasis-200401-wss-wssecurity-utility-1.0.xsd">
<SendData xmlns="http://tempuri.org/">
<array
xmlns:a="http://schemas.microsoft.com/2003/10/Serialization/...