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Is arr.__len__() the preferred way to get the length of an array in Python?
...l, builtin function; __len__() is a method that object can implement. len(foo) usually ends up calling foo.__len__().
– Tim Lesher
Feb 5 '09 at 21:33
13
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Linux command to list all available commands and aliases
...ter solution to the problem then the call to grep. So you can do type -a foo and if foo isn't available it returns command not found or something like that. So you are able to check for a command without calling the command itself.
– Janusz
Jun 4 '09 at 0:41
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Converting Dictionary to List? [duplicate]
...ution for your problem:
[(k,v) for k,v in dict.items()]
and result:
[('Food', 'Fish&Chips'), ('2012', 'Olympics'), ('Capital', 'London')]
or you can do
l=[]
[l.extend([k,v]) for k,v in dict.items()]
for:
['Food', 'Fish&Chips', '2012', 'Olympics', 'Capital', 'London']
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How to convert linq results to HashSet or HashedSet
... pass your IEnumerable into the constructor for HashSet.
HashSet<T> foo = new HashSet<T>(from x in bar.Items select x);
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top -c command in linux to filter processes listed based on processname
...er on a column, e.g. to show rows where COMMAND column contains the string foo, write COMMAND=foo
If you just want some basic output this might be enough:
top -bc |grep name_of_process
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How to 'grep' a continuous stream?
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In most cases, you can tail -f /var/log/some.log |grep foo and it will work just fine.
If you need to use multiple greps on a running log file and you find that you get no output, you may need to stick the --line-buffered switch into your middle grep(s), like so:
tail -f /var/l...
initializer_list and move semantics
...ate just one version of the code in the context of the callee (i.e. inside foo it does not know anything about the arguments that the caller is passing in)
– David Rodríguez - dribeas
Nov 19 '11 at 10:34
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Call a function after previous function is complete
...fire when expected. The example in my comment above shows that because the foo() function has asynchronous code in it, bar() does not fire it's content after foo()'s content is done executing, even using $.when().then() to call them one after the other. This answer is only valid if (and only if) all...
Check if a variable is of function type
...e are several ways so I will summarize them all
Best way is:
function foo(v) {if (v instanceof Function) {/* do something */} };
Most performant (no string comparison) and elegant solution - the instanceof operator has been supported in browsers for a very long time, so don't worry - it will ...
Java, List only subdirectories from a directory, not files
...ifying any depth limitation, it would give :
Path directory = Paths.get("/foo/bar");
try {
List<Path> directories =
Files.walk(directory)
.filter(Files::isDirectory)
.collect(Collectors.toList());
} catch (IOException e) {
// process exce...