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How to check if array element exists or not in javascript?

...fined') { // does not exist } else { // does exist } } catch (error){ /* ignore */ } ...that's how it worked in chrome, anyway (otherwise, the code stopped with an error). share | imp...
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Processing $http response in service

... Is there any way to still call the success and error methods in the controller after the service has intercepted with then? – andyczerwonka Jan 10 '13 at 2:31 ...
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How to use a variable to specify column name in ggplot

... facet_grid? It works with facet_grid(cols = vars(!!column)) but throws an error with facet_grid(~ !!column) – mRiddle Oct 20 '19 at 6:57 add a comment  |  ...
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Using {} in a case statement. Why?

... return a * x; case 1337: int x = GetSomeOtherValue(); //ERROR return a * x; } You will get a compiler error because x is already defined in the scope. Separating these to their own sub-scope will eliminate the need to declare x outside the switch statement. switch (a) ...
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Get: TypeError: 'dict_values' object does not support indexing when using python 3.2.3 [duplicate]

... Unfortuately, when I use the vlst example, I get an error "'dict' object has no attribute 'values' – Jesse Pet Jul 2 '13 at 17:18 ...
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Changing column names of a data frame

...as in q1 <- q1 %>% mutate(rel_count = count / 482462) results in the error Error in mutate_impl(.data, dots) : unknown column 'days' (where days is a new name given to the column). This is really frustrating. – David Tonhofer Feb 7 '17 at 21:19 ...
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(Mac) -bash: __git_ps1: command not found

I'm trying to change my command promt in terminal. I keep getting the error: 19 Answers ...
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ImportError: No module named six

... trying to build OpenERP project, done with dependencies. It's giving this error now 7 Answers ...
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New features in java 7

...tiple exception catching this: } catch (FirstException ex) { logger.error(ex); throw ex; } catch (SecondException ex) { logger.error(ex); throw ex; } becomes: } catch (FirstException | SecondException ex) { logger.error(ex); throw ex; } SafeVarargs this: @Suppre...
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Infinite Recursion with Jackson JSON and Hibernate JPA issue

...rialized, in order to avoid the infite loop that causes your stackoverflow error. So, Jackson takes the forward part of the reference (your Set<BodyStat> bodyStats in Trainee class), and converts it in a json-like storage format; this is the so-called marshalling process. Then, Jackson looks ...