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Queries vs. Filters
I can't see any description of when I should use a query or a filter or some combination of the two. What is the difference between them? Can anyone please explain?
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What is the printf format specifier for bool?
Since ANSI C99 there is _Bool or bool via stdbool.h . But is there also a printf format specifier for bool?
8 Answer...
What's the difference between Sender, From and Return-Path?
What's the difference between an email Sender, From and Return-Path value?
3 Answers
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Why does parseInt yield NaN with Array#map?
From the Mozilla Developer Network :
7 Answers
7
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Does Ruby have a string.startswith(“abc”) built in method?
Does Ruby have a some_string.starts_with("abc") method that's built in?
4 Answers
4
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Comparing arrays in JUnit assertions, concise built-in way?
Is there a concise, built-in way to do equals assertions on two like-typed arrays in JUnit? By default (at least in JUnit 4) it seems to do an instance compare on the array object itself.
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Undo svn add without reverting local edits
I accidentally ran svn add * and added a bunch of files that shouldn't be in the repository. I also have local edits in some files that I want to keep. Is there a simple way to just undo the svn add without reverting the local edits? The main suggestion I see on Google is svn revert , which sup...
Programmatically set height on LayoutParams as density-independent pixels
Is there any way to set the height/width of a LayoutParams as density-independent pixels (dp)? It looks like the height/width, when set programmatically, are in pixels and not dp.
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“Insert if not exists” statement in SQLite
I have an SQLite database. I am trying to insert values ( users_id , lessoninfo_id ) in table bookmarks , only if both do not exist before in a row.
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dplyr: “Error in n(): function should not be called directly”
I am attempting to reproduce one of the examples in the dplyr package but am getting this error message. I am expecting to see a new column n produced with the frequency of each combination. What am I missing? I triple checked that the package is loaded.
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