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How do I convert an interval into a number of hours with postgres?

Say I have an interval like 6 Answers 6 ...
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How to find all occurrences of a substring?

Python has string.find() and string.rfind() to get the index of a substring in a string. 20 Answers ...
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Ruby on Rails: How do I add placeholder text to a f.text_field?

How can I add placeholder text to my f.text_field fields so that the text comes pre-written by default, and when a user click inside the fields, the text goes away - allowing the user to type in the new text? ...
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Suppress properties with null value on ASP.NET Web API

I've created an ASP.Net WEB API Project that will be used by a mobile application. I need the response json to omit null properties instead of return them as property: null . ...
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How to use GNU Make on Windows?

I installed MinGW and MSYS, added C:\MinGW\bin to PATH but I still can't run Makefile on Windows' cmd . I would like to run cmd.exe and there type, for example, make all but my cmd says that there is no such command. ...
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Are there any side effects of returning from inside a using() statement?

Returning a method value from inside a using statement that gets a DataContext seems to always work fine , like this: 5 ...
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What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]

I would like to see the structure of object in JavaScript (for debugging). Is there anything similar to var_dump in PHP? 9 ...
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How do I get the difference between two Dates in JavaScript?

I'm creating an application which lets you define events with a time frame. I want to automatically fill in the end date when the user selects or changes the start date. I can't quite figure out, however, how to get the difference between the two times, and then how to create a new end Date using ...
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How to get the text node of an element?

I wish to get the "I am text node", do not wish to remove the "edit" tag, and need a cross browser solution. 10 Answers ...
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Edit a commit message in SourceTree Windows (already pushed to remote)

How do I edit an incorrect commit message in SourceTree without touching the command line? 4 Answers ...