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callback to handle completion of pipe

I am using the following node.js code to download documents from some url and save it in the disk. I want to be informed about when the document is downloaded. i have not seen any callback with pipe.Or, Is there any 'end' event that can be captured on completion of download ? ...
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ManyRelatedManager object is not iterable

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Select distinct values from a table field

I'm struggling getting my head around the Django's ORM. What I want to do is get a list of distinct values within a field on my table .... the equivalent of one of the following: ...
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What is the fastest way to get the value of π?

I'm looking for the fastest way to obtain the value of π, as a personal challenge. More specifically, I'm using ways that don't involve using #define constants like M_PI , or hard-coding the number in. ...
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RegEx to make sure that the string contains at least one lower case char, upper case char, digit and

What is the regex to make sure that a given string contains at least one character from each of the following categories. ...
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Setting default permissions for newly created files and sub-directories under a directory in Linux?

I have a bunch of long-running scripts and applications that are storing output results in a directory shared amongst a few users. I would like a way to make sure that every file and directory created under this shared directory automatically had u=rwxg=rwxo=r permissions. ...
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Changing the size of a column referenced by a schema-bound view in SQL Server

I'm trying to change the size of a column in sql server using: 6 Answers 6 ...
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What is “String args[]”? parameter in main method Java

I'm just beginning to write programs in Java. What does the following Java code mean? 16 Answers ...
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Relative paths based on file location instead of current working directory [duplicate]

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What's wrong with Groovy multi-line String?

Groovy scripts raises an error: 3 Answers 3 ...