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what does npm -D flag mean?

I am about to install this npm package and it says npm install -D load-grunt-config , what does the -D flag do? 3 Answer...
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how to get the host url using javascript from the current page

... hostname will give only domain and host will provide port also. This is great mini tool to see link anatomy bl.ocks.org/abernier/3070589 – Lukas Liesis Apr 11 '16 at 5:00 ...
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How do I get SUM function in MySQL to return '0' if no values are found?

...nformation: Given three tables (one with all numbers, one with all nulls, and one with a mixture): SQL Fiddle MySQL 5.5.32 Schema Setup: CREATE TABLE foo ( id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, val INT ); INSERT INTO foo (val) VALUES (null),(1),(null),(2),(null),(3),(null),(4),(n...
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Get pandas.read_csv to read empty values as empty string instead of nan

I'm using the pandas library to read in some CSV data. In my data, certain columns contain strings. The string "nan" is a possible value, as is an empty string. I managed to get pandas to read "nan" as a string, but I can't figure out how to get it not to read an empty value as NaN. Here's sam...
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Center Align on a Absolutely Positioned Div

...t. This is awesome! Could you explain how it works? Edit: Did some hunting and it seems like the left: 50% moves the div's left location to the center, which isn't really center. But the translateX shifts it back 50% of the content's width – Aziz Javed Nov 10 '...
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How to use ternary operator in razor (specifically on HTML attributes)?

... Here's a handy reference to Razor syntax: C# Razor Syntax Quick Reference – Ryan Lundy Jun 24 '11 at 15:24 ...
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Can you use an alias in the WHERE clause in mysql?

...e performance implications since HAVING executes after the data is fetched and WHERE executes before. – StockB Feb 15 '17 at 19:16 ...
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How to do ssh with a timeout in a script?

... is taking an infinite time to run, I want to come out of that ssh session and continue other lines in my sh script. 6 Answ...
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Trying to fire the onload event on script tag

... can you help me understand why the ordering is important? – chovy Apr 26 '13 at 8:19 12 ...
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SQLite: How do I save the result of a query as a CSV file?

... From here and d5e5's comment: You'll have to switch the output to csv-mode and switch to file output. sqlite> .mode csv sqlite> .output test.csv sqlite> select * from tbl1; sqlite> .output stdout ...