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Get column index from column name in python pandas
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Or when using libraries which want the DF converted to a numpy array and indices of columns with particular features. For example CatBoost wants a list of indices of categorical features.
– Tom Walker
Oct 13 '17 at 5:35
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Exotic architectures the standards committees care about
...ters (including void*) always had the same size. (Of course, you couldn't convert a function pointer to void*, since void* might be smaller. But according to the standard, you can't do that today, either.)
– James Kanze
Aug 7 '11 at 22:54
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How to automatically generate a stacktrace when my program crashes
...used ones, to the dynamic symbol table. This allows backtrace_symbols() to convert addresses to function names
– jschmier
Mar 26 '10 at 20:00
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What is the difference between a strongly typed language and a statically typed language?
...he type system. C is notoriously weakly typed because any pointer type is convertible to any other pointer type simply by casting. Pascal was intended to be strongly typed, but an oversight in the design (untagged variant records) introduced a loophole into the type system, so technically it is we...
In Python, how do I index a list with another list?
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It works better if you need to convert it for array operations anyways. Too time-consuming for regular list operations.
– frankliuao
Jan 3 '19 at 19:25
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How can I get the actual stored procedure line number from an error message?
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'Ms Sql Server Error: - ' + ERROR_MESSAGE() + ' - Error occured at: ' + CONVERT(VARCHAR(20), ERROR_LINE())
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Understanding __get__ and __set__ and Python descriptors
...AttributeError: __delete__
And you can't assign a variable that can't be converted to a float:
>>> t1.celsius = '0x02'
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 7, in __set__
ValueError: invalid literal for float(): ...
WPF TemplateBinding vs RelativeSource TemplatedParent
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One more thing - TemplateBindings don't allow value converting. They don't allow you to pass a Converter and don't automatically convert int to string for example (which is normal for a Binding).
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Swift Beta performance: sorting arrays
...amp;x_c, CInt(x_c.count))
let c_stop:UInt64 = mach_absolute_time();
This converts the absolute times to seconds:
static const uint64_t NANOS_PER_USEC = 1000ULL;
static const uint64_t NANOS_PER_MSEC = 1000ULL * NANOS_PER_USEC;
static const uint64_t NANOS_PER_SEC = 1000ULL * NANOS_PER_MSEC;
mach_t...
Simple way to create matrix of random numbers
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First, create numpy array then convert it into matrix. See the code below:
import numpy
B = numpy.random.random((3, 4)) #its ndArray
C = numpy.matrix(B)# it is matrix
print(type(B))
print(type(C))
print(C)
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