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To find whether a column exists in data frame or not
I have a data.frame with the name "abcframe"
4 Answers
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How do I escape characters in c# comments?
I realized today that I don't know how to escape characters in comments for C#. I want to document a generic C# class, but I can not write a proper example since I don't know how to escape the < and > characters. Do I have to use &lt; and &gt; ? I don't like if that is the case ...
Cannot use a CONTAINS or FREETEXT predicate on table or indexed view because it is not full-text ind
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- full-text catalog exists. You have to specify full-text catalog name explicitly if there is no default full-text catalog.
You can do step 2 and 3 in SQL Sever Management Studio. In object explorer, right click on a table, select Full-Text index menu item and then Define Full-Text Index......
Postgres: How to do Composite keys?
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How would you implement a contraint like "CONSTRAINT no_duplicate_refences UNIQUE REFERENCE FROM tag_id TO (tag1, tag2, tag3)"?
– Léo Léopold Hertz 준영
Aug 17 '09 at 4:46
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Pure JavaScript Send POST Data Without a Form
Is there a way to send data using the POST method without a form and without refreshing the page using only pure JavaScript (not jQuery $.post() )? Maybe httprequest or something else (just can't find it now)?
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Can Selenium interact with an existing browser session?
...a running browser . So it's officially not supported.
However, there is some working code which claims to support this: https://web.archive.org/web/20171214043703/http://tarunlalwani.com/post/reusing-existing-browser-session-selenium-java/.
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R object identification
...pe. I'm expecting a list and it ends up being a list of lists or a data frame or something else. What's a good method or workflow for figuring out the output data type when first using a function?
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TortoiseHg Apply a Patch
TortoiseHg allows you to email a patch file of your changes to someone, but does it support applying patches?
4 Answers
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How to find index of list item in Swift?
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As swift is in some regards more functional than object-oriented (and Arrays are structs, not objects), use the function "find" to operate on the array, which returns an optional value, so be prepared to handle a nil value:
let arr:Array = [...
Call to getLayoutInflater() in places not in activity
...sn't work, do you have any ideas about that ? inflater.inflate(R.layout.some_layout, (ViewGroup) findViewById(R.id.parent));
– Lukap
Oct 18 '11 at 7:48
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