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How to pass a user defined argument in scrapy spider

I am trying to pass a user defined argument to a scrapy's spider. Can anyone suggest on how to do that? 5 Answers ...
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Ignoring time zones altogether in Rails and PostgreSQL

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How to check if a variable exists in a FreeMarker template?

I have a Freemarker template which contains a bunch of placeholders for which values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like: ...
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How can I move a single directory from a git repository to a new repository whilst maintaining the h

I have inherited a git repository containing multiple projects in separate directories. I'd like to split the repository into new individual repositories, one for each project and then have the master repository contain the projects as submodules. I'd like to do all this whilst maintaining the revis...
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Global and local variables in R

I am a newbie for R, and I am quite confused with the usage of local and global variables in R. 3 Answers ...
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Should I use the Reply-To header when sending emails as a service to others?

Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers. 3 Answers ...
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Create Directory if it doesn't exist with Ruby

I am trying to create a directory with the following code: 4 Answers 4 ...
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“icon-bar” in twitter bootstrap navigation bar

I cannot understand what the following code means in terms of icon-bar : 3 Answers 3 ...
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What is the difference between object keys with quotes and without quotes?

Is there any difference between 5 Answers 5 ...
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How to get all child inputs of a div element (jQuery)

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