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pandas: multiple conditions while indexing data frame - unexpected behavior
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As you can see, the AND operator drops every row in which at least one
value equals -1. On the other hand, the OR operator requires both
values to be equal to -1 to drop them.
That's right. Remember that you're writing the condition in te...
Set a default parameter value for a JavaScript function
...ments which I set a default on, which get used if the value isn't defined (and ignored if the value is passed). In Ruby you can do it like this:
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Creating Multifield Indexes in Mongoose / MongoDB
...xes in Mongoosejs. In particular I have two fields that need to be indexed and unique. What is an example mongoose schema that indexes two fields together?
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What is the python “with” statement designed for?
...r the first time today. I've been using Python lightly for several months and didn't even know of its existence! Given its somewhat obscure status, I thought it would be worth asking:
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Regarding 'main(int argc, char *argv[])' [duplicate]
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The arguments argc and argv of main is used as a way to send arguments to a program, the possibly most familiar way is to use the good ol' terminal where an user could type cat file. Here the word cat is a program that takes a file and outputs ...
Using PowerShell credentials without being prompted for a password
...restring.txt
Wherever you see a -Credential argument on a PowerShell command then it means you can pass a PSCredential. So in your case:
$username = "domain01\admin01"
$password = Get-Content 'C:\mysecurestring.txt' | ConvertTo-SecureString
$cred = new-object -typename System.Management.Automatio...
validation custom message for rails 3
... edited Mar 4 '15 at 3:20
Andrew Hendrie
5,08722 gold badges3434 silver badges6262 bronze badges
answered Mar 22 '11 at 4:33
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为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...属性→高级系统设置→高级→环境变量
新建JAVA_HOME:如果是默认安装路径那么就在这个路径下：C:\Program Files\Java\jdk1.8.0_171
新建Classpath： .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
在Path后面新增：%JAVA_HOME%\bin;%JAVA_HOME%\...
How do I copy an entire directory of files into an existing directory using Python?
...ctory that contains a directory named bar (containing one or more files) and a directory named baz (also containing one or more files). Make sure there is not a directory named foo .
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Having options in argparse with a dash
...e pm . How can I get around this issue? Is it possible to have - in command line options?
3 Answers
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