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How do I remove duplicate items from an array in Perl?
...is as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three
If you want to use a module, try the uniq function from List::MoreUtils
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Displaying better error message than “No JSON object could be decoded”
... also up on PYPI: https://pypi.python.org/pypi/rson/0.9 so you can use easy_install or pip to get it.
for the example given by tom:
>>> rson.loads('[1,2,]')
...
rson.base.tokenizer.RSONDecodeError: Unexpected trailing comma: line 1, column 6, text ']'
RSON is a designed to be a superset...
How to pass parameters to ThreadStart method in Thread?
...ers, and you get compile-time checking without needing to cast from object all the time.
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Accessing nested JavaScript objects and arays by string path
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great stuff; using the lodash library, one can also do: _.get(object, nestedPropertyString);
– ian
Aug 13 '15 at 12:49
17
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How do you use the “WITH” clause in MySQL?
I am converting all my SQL Server queries to MySQL and my queries that have WITH in them are all failing. Here's an example:
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How do I do an OR filter in a Django query?
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@alexis: you could also do Item.objects.filter(creator__in=creators), for example.
– Kevin London
Dec 9 '14 at 23:11
4
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Breakpoint on property change
...al object
var obj = {
someProp: 10
};
// save in another property
obj._someProp = obj.someProp;
// overwrite with accessor
Object.defineProperty(obj, 'someProp', {
get: function () {
return obj._someProp;
},
set: function (value) {
debugger; // sets breakpoint
...
Python: Using .format() on a Unicode-escaped string
...gt; print s
≥
>>> print "{0}".format(s)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2265' in position 0: ordinal not in range(128)
>>> print u"{0}".format(s)
≥
>>>
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How do I compare two strings in Perl?
...rldoc perlop for more information.
( I'm simplifying this a little bit as all but cmp return a value that is both an empty string, and a numerically zero value instead of 0, and a value that is both the string '1' and the numeric value 1. These are the same values you will always get from boolean o...
Remove all special characters, punctuation and spaces from string
I need to remove all special characters, punctuation and spaces from a string so that I only have letters and numbers.
16 A...