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how do I initialize a float to its max/min value?
How do I hard code an absolute maximum or minimum value for a float or double? I want to search out the max/min of an array by simply iterating through and catching the largest.
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Get the latest record from mongodb collection
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This is a rehash of the previous answer but it's more likely to work on different mongodb versions.
db.collection.find().limit(1).sort({$natural:-1})
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No route matches [GET] /assets
...=production rake assets:precompile which generated all of my assets in /public/assets. The problem is that when I start my app w/ RAILS_ENV=production rails s thin I get:
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How can I auto-elevate my batch file, so that it requests from UAC administrator rights if required?
I want my batch file to only run elevated. If not elevated, provide an option for the user to relaunch batch as elevated.
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Best way to simulate “group by” from bash?
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sort ip_addresses | uniq -c
This will print the count first, but other than that it should be exactly what you want.
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Is there a common Java utility to break a list into batches?
I wrote myself a utility to break a list into batches of given size. I just wanted to know if there is already any apache commons util for this.
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How to print a dictionary's key?
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A dictionary has, by definition, an arbitrary number of keys. There is no "the key". You have the keys() method, which gives you a python list of all the keys, and you have the iteritems() method, which returns key-value pairs, so
for key, va...
How to check if a path is absolute path or relative path in cross platform way with Python?
UNIX absolute path starts with '/', whereas Windows starts with alphabet 'C:' or '\'.
Does python has a standard function to check if a path is absolute or relative?
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How to select a drop-down menu value with Selenium using Python?
...cting the option(s) you want.
Here is an example:
from selenium import webdriver
b = webdriver.Firefox()
b.find_element_by_xpath("//select[@name='element_name']/option[text()='option_text']").click()
You can read more in:
https://sqa.stackexchange.com/questions/1355/unable-to-select-an-option-u...
LEGO EV3 机器人按键控制 · App Inventor 2 中文网
... 下载
示例项目文件：
EV3_ButtonControl.aia
机器人组装说明
请按照图1组装您的机器人。如果您的机器人结构有所不同，不必担心，只需确保两个电机（连接到端口B和C）位于机器人...