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How to get the first element of an array?

...code. It simply shows undefined, since that's the value of a[0], which actually is the first item in the array. If you want it to show foo you should skip all undefined values but it wouldn't be the first item in the array. – Michiel van der Blonk Sep 6 '16 at ...
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How to tag an older commit in Git?

...epository, but we've made commits since then. A tag at the beginning would allow us to "roll back" production to a known, stable state. ...
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How do you search an amazon s3 bucket?

... To all the upvoters of the above comment: the OP doesnt indicate whether they are wanting to search the file names or the key contents (e.g. file contents). So @rhonda's answer still might not be sufficient. It appears that ulti...
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Are Databases and Functional Programming at odds?

... First of all, I would not say that CLOS (Common Lisp Object System) is "pseudo-OO". It is first class OO. Second, I believe that you should use the paradigm that fits your needs. You cannot statelessly store data, while a function ...
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MongoDB/NoSQL: Keeping Document Change History

... changes to one or more specific entities in a database. I've heard this called row versioning, a log table or a history table (I'm sure there are other names for it). There are a number of ways to approach it in an RDBMS--you can write all changes from all source tables to a single table (more of...
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What is the common header format of Python files?

... Its all metadata for the Foobar module. The first one is the docstring of the module, that is already explained in Peter's answer. How do I organize my modules (source files)? (Archive) The first line of each file shoud be #!/us...
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How to check task status in Celery?

How does one check whether a task is running in celery (specifically, I'm using celery-django)? 13 Answers ...
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How can I debug my JavaScript code? [closed]

... @NinaScholz Now all browsers come with jetpacks by default ! – oneCoderToRuleThemAll Jan 31 '17 at 17:59 add a comme...
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Explode PHP string by new line

...from. So please use the solution from @Alin_Purcaru (three down) to cover all your bases (and upvote his answer): $skuList = preg_split('/\r\n|\r|\n/', $_POST['skuList']); share | improve this an...
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Why should I use version control? [closed]

...re "advanced" features like branching and merging let you have multiple parallel lines of development. You can work in two simultaneous features without interference and switch back and forth without much hassle. You can see "what changed". This may sound basic, but that's something I find myself ch...