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Understanding slice notation
...[:-2] and a only contains one element, you get an empty list instead of an error. Sometimes you would prefer the error, so you have to be aware that this may happen.
Relation to slice() object
The slicing operator [] is actually being used in the above code with a slice() object using the : notati...
iPhone UITextField - Change placeholder text color
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On iOS 7 I got this error: [<UITextField 0x11561d90> valueForUndefinedKey:]: this class is not key value coding-compliant for the key _field.
– i_am_jorf
Apr 9 '14 at 19:27
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Convert number to month name in PHP
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I never saw this on SO - Fatal error: Call to a member function format() on a non-object in Noone from 48 pluses didnt have this?
– Jaroslav Štreit
Jan 8 '15 at 12:12
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Why are local variables not initialized in Java?
...meObject();
so.DoUsefulThings();
} finally {
so.CleanUp(); // Compiler error here
}
The commenter's complaint is that the compiler balks at the line in the finally section, claiming that so might be uninitialized. The comment then mentions another way of writing the code, probably something li...
Format floats with standard json module
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In Python3 it gives "Map object is not JSON serializable" error, but you can resolve converting the map() to a list with list( map(pretty_floats, obj) )
– Guglie
Oct 11 '18 at 23:54
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Which regular expression operator means 'Don't' match this character?
...;>> re.match('[^f]', 'foo')
>>> re.match('[^f]', 'bar')
<_sre.SRE_Match object at 0x7f8b102ad6b0>
>>> re.match('(?!foo)...', 'foo')
>>> re.match('(?!foo)...', 'bar')
<_sre.SRE_Match object at 0x7f8b0fe70780>
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reformat in vim for a nice column layout
...command in visual mode for step #1 is: '<,'>s/"\(\w\+\) \(\w\+\)"/"\1_\2"/g
– Luciano
Aug 11 '15 at 9:38
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What is the equivalent of the C++ Pair in Java?
Is there a good reason why there is no Pair<L,R> in Java? What would be the equivalent of this C++ construct? I would rather avoid reimplementing my own.
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Execute the setInterval function without delay the first time
...after the current processing cycle, which is also immediately, but is more error proven.
– pensan
Oct 2 '16 at 10:33
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Convert a PHP object to an associative array
...across all versions since PHP 4.3. See 3v4l.org/X6lhm. If you get a syntax error, you did something wrong.
– Gordon
Nov 30 '15 at 10:26
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