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Checking if a key exists in a JavaScript object?
...("key" in obj) // true if "key" doesn't exist in object
!"key" in obj // ERROR! Equivalent to "false in obj"
Or, if you want to particularly test for properties of the object instance (and not inherited properties), use hasOwnProperty:
obj.hasOwnProperty("key") // true
For performance compar...
Haskell Type vs Data Constructor
...te a list of Maybes - if you try to execute
[] :: [Maybe]
you'll get an error. You can however create a list of Maybe Int, or Maybe a. That's because Maybe is a type constructor function, but a list needs to contain values of a concrete type. Maybe Int and Maybe a are concrete types (or if you wa...
Using an HTML button to call a JavaScript function
...The problem appears to be in the CapacityCount function. I'm getting this error in my console on Firefox 3.5: "document.all is undefined" on line 759 of bendelcorp.js.
Edit:
Looks like document.all is an IE-only thing and is a nonstandard way of accessing the DOM. If you use document.getElementB...
Any reason to write the “private” keyword in C#?
...ertainly wish there were no defaults at all and the compiler just threw an error if the access modifier was missing. I don't think most people know what the defaults are for every situation, which then leads to unintended errors.
– user315772
Dec 13 '11 at 19:4...
I want to remove double quotes from a String
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This will error on FireFox with: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
– Ben Pretorius
Feb 24 '16 at 10:28
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How to put more than 1000 values into an Oracle IN clause [duplicate]
...Sometimes this list can exceed 1000 items, at which point Oracle throws an error. The query is similar to this...
11 Answe...
How do I add a linker or compile flag in a CMake file?
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i tried that but it still gives error. Is set(CMAKE_CXX_FLAGS "-fexceptions") the only way to specify compiler flag.
– solti
Aug 2 '12 at 19:50
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How to disable a particular checkstyle rule for a particular line of code?
...e preferences if you like:
Preferences:
Java
--> Compiler
--> Errors/Warnings
--> Annotations
--> Unhandled token in '@SuppressWarnings': set to 'Ignore'
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Don't display pushd/popd stack across several bash scripts (quiet pushd/popd)
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If you want to silence errors (e.g. no such directory) too, then you can use &> instead of >
– MattSturgeon
Apr 16 '17 at 17:36
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Best way to test SQL queries [closed]
... run into a problem wherein we keep having complex SQL queries go out with errors. Essentially this results in sending mail to the incorrect customers and other 'problems' like that.
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