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execJs: 'Could not find a JavaScript runtime' but execjs AND therubyracer are in Gemfile
... 'make' on) and create your own rpm and install on original RH box(if old glibc on RH plays nice).
The real issue here(IMHO) is installing Gems that have dependencies on installed packages outside of the ruby environment, is there a way of knowing before installing ? an RFI for Gems or bundler ?
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Ruby equivalent of virtualenv?
... root of a project will install the gems listed from your Gemfile, put the libs in ./vendor, and any executables in ./bin and all requires (if you use bundle console or the Bundler requires) will reference these exes and libs.
Works for me.
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How to hash some string with sha256 in Java?
...an I hash some string with sha256 in Java? Does anybody know of any free library for this?
15 Answers
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Rails: update_attribute vs update_attributes
...ource you will get following code
# File vendor/rails/activerecord/lib/active_record/base.rb, line 2614
2614: def update_attribute(name, value)
2615: send(name.to_s + '=', value)
2616: save(false)
2617: end
and now refer update_attributes and look at its code yo...
Log to the base 2 in python
...ntroduced in 3.3. Can you confirm it is only in 3.4? docs.python.org/3.3/library/math.html
– ZaydH
Apr 18 '19 at 21:33
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Deep Learning（深度学习）学习笔记整理系列之（四） - 大数据 & AI - 清泛...
...网上很大牛和机器学习专家所无私奉献的资料的。具体引用的资料请看参考文献。具体的版本声明也参考原文献。
2）本文仅供学术交流，非商用。所以每一部分具体的参考资料并没有详细对应。如果某部分不小心侵犯了大家的...
Given a URL to a text file, what is the simplest way to read the contents of the text file?
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Edit 09/2016: In Python 3 and up use urllib.request instead of urllib2
Actually the simplest way is:
import urllib2 # the lib that handles the url stuff
data = urllib2.urlopen(target_url) # it's a file like object and works just like a file
for line in data: #...
Get current date/time in seconds
.../ 1000)); // 1443535752
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
jQuery
console.log(Math.floor($.now() / 1000)); // 1443535752
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">...
Error Dropping Database (Can't rmdir '.test\', errno: 17)
...abase is represented by a directory under the data directory (usually /var/lib/mysql), and the directory is intended for storage of table data.
The DROP DATABASE statement will remove all table files and then remove the directory that represented the database. It will not, however, remove non-table...
Defining custom attrs
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If you are using custom attrs from a library project: see this question: stackoverflow.com/questions/5819369/… - It seems to work if you use xmlns:my="http://schemas.android.com/apk/lib/my.namespace" - no copying attrs.xml. Note the namespace URI path must be...