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How to throw a C++ exception
...is is also relevant if the caught objects were "normal" object like: class Base{}; and class Derived : public Base {}...
5) g++ 7.3.0 on Ubuntu 18.04.1 produces a warning that indicates the mentioned issue:
In function ‘void illustrateDerivedExceptionCatch()’:
item12Linux.cpp:48:2: warnin...
Is there a way to 'uniq' by column?
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To consider multiple column.
Sort and give unique list based on column 1 and column 3:
sort -u -t : -k 1,1 -k 3,3 test.txt
-t : colon is separator
-k 1,1 -k 3,3 based on column 1 and column 3
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Pythonic way to check if a file exists? [duplicate]
...t. If it does exists, it will print "Ooops" and return None (untested, and based solely on reading the python documentation, so might not be 100% correct).
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How to set selected item of Spinner by value, not by position?
I have a update view, where I need to preselect the value stored in database for a Spinner.
25 Answers
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Why there is no ConcurrentHashSet against ConcurrentHashMap
HashSet is based on HashMap.
9 Answers
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Change select box option background color
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I don't know if you've considered it or not but if your application is based on coloring various groupings of items you should probably use the <optgroup> tag coupled with a class for further referencing. For example:
<select>
<optgroup label="Numbers" class="green">
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Get the last inserted row ID (with SQL statement) [duplicate]
... row (similar to behavior of an update statement that updates a single row based on input of multiple joined rows).
– BVernon
Jan 6 '19 at 22:56
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AWK: Access captured group from line pattern
...is something I need all the time so I created a bash function for it. It's based on glenn jackman's answer.
Definition
Add this to your .bash_profile etc.
function regex { gawk 'match($0,/'$1'/, ary) {print ary['${2:-'0'}']}'; }
Usage
Capture regex for each line in file
$ cat filename | regex...
OSGi, Java Modularity and Jigsaw
...ou cannot simply sprinkle modularity on top of an existing non-modular codebase. Making a non-modular codebase into a modular one inevitably requires some refactoring: moving classes into the correct package, replacing direct instantiation with the use of decoupled services, and so on.
This makes i...
nServiceBus vs Mass Transit vs Rhino Service Bus vs other?
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a potential con of anything MSMQ based is the restriction on maximum message size. IIRC it is approximately 4MB, which you might easily run into if you're dealing with large files and storing the file content within the message.
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