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Exception thrown inside catch block - will it be caught again?
...is piece of code below, will the exception thrown in the first catch block then be caught by the general Exception catch block below?
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What's the difference between deadlock and livelock?
...cannot continue they release their held resource and sleep for 30 seconds, then they retrieve their original resource followed by trying to the resource the other process held, then left, then reaquired. Since both processes are trying to cope (just badly), this is a livelock.
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What is the best CSS Framework and are they worth the effort?
...is not like JavaScript, where you can include a base library/framework and then call functions and objects from it to do higher-level work. All a CSS framework can give you is declarative rules: some default browser-rule-reset stuff, some class styles to be forced to author your page to, and layout ...
If string is empty then return some default value
...
Ruby:
unless my_str.empty? then my_str else 'default' end
RoR:
unless my_str.blank? then my_str else 'default' end
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valueOf() vs. toString() in Javascript
...ating "+", javascript first collects primitive values of the operands, and then decides if addition or concatenation should be applied, based on the type of each primitive.
So, this is how you think it works
a + b:
pa = ToPrimitive(a)
if(pa is string)
return concat(pa, ToString(b))
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Should functions return null or an empty object?
...ing the problem and returning null. At a minimum, you should log this and then continue.
– Chris Ballance
Oct 26 '09 at 18:50
130
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How to find whether or not a variable is empty in Bash
...t least the following command tests if $var is empty:
if [[ -z "$var" ]]; then
# Do what you want
fi
The command man test is your friend.
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What does android:layout_weight mean?
...e map should use 3/4 of the screen and table should use 1/4 of the screen. Then you will set the layout_weight of the map to 3 and the layout_weight of the table to 1.
To get it work you also have to set the height or width (depending on your orientation) to 0px.
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Regex lookahead for 'not followed by' in grep
...grep, the current version supports options -P or --perl-regexp and you can then use the regex you wanted.
If you don't have (a sufficiently recent version of) GNU grep, then consider getting ack.
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Unable to update the EntitySet - because it has a DefiningQuery and no element exis
...e in the Entity Framework designer (or alternatively delete the entity and then add it) before you stop getting the error.
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