大约有 16,000 项符合查询结果（耗时：0.0134秒） [XML]
How do I convert a float number to a whole number in JavaScript?
I'd like to convert a float to a whole number in JavaScript. Actually, I'd like to know how to do BOTH of the standard conversions: by truncating and by rounding. And efficiently, not via converting to a string and parsing.
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Count occurrences of a char in plain text file
...000 occurences of the searched character:
real 0m0.089s
user 0m0.057s
sys 0m0.027s
Time for Vereb answer with echo, cat, tr and bc for the same file:
real 0m0.168s
user 0m0.059s
sys 0m0.115s
Time for Rob Hruska answer with tr, sed and wc for the same file:
real 0m0.465s
user ...
What is the best way to call a script from another script?
... to pass command-line arguments to the script, you could edit sys.argv list.
– jfs
Jan 13 '15 at 18:09
1
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Convert a string representation of a hex dump to a byte array using Java?
I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array.
24 Answers
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Is there an exponent operator in C#?
...rator for C# was a big annoyance for us when looking for a new language to convert our calculation software to from the good ol' vb6.
I'm glad we went with C# but it still annoys me whenever I'm writing a complex equation including exponents. The Math.Pow() method makes equations quite hard to read ...
C++ Convert string (or char*) to wstring (or wchar_t*)
...;locale>
#include <codecvt>
#include <string>
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
std::string narrow = converter.to_bytes(wide_utf16_source_string);
std::wstring wide = converter.from_bytes(narrow_utf8_source_string);
Longer online compilab...
Converting BigDecimal to Integer
...rge.
To get the best of both worlds, round off the BigDecimal first, then convert. This also has the benefit of giving you more control over the rounding process.
Spock Groovy Test
void 'test BigDecimal rounding'() {
given:
BigDecimal decimal = new BigDecimal(Integer.MAX_VALUE - 1.99)
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Regular cast vs. static_cast vs. dynamic_cast [duplicate]
...f it cannot be avoided altogether.
Dynamic cast
This one is only used to convert object pointers and object references into other pointer or reference types in the inheritance hierarchy. It is the only cast that makes sure that the object pointed to can be converted, by performing a run-time check...
e.printStackTrace equivalent in python
...immediately.
The same semantics in Python 2 are:
import traceback
import sys
try: # code that may raise an error
pass
except IOError as e: # exception handling
# in Python 2, stderr is also unbuffered
print >> sys.stderr, traceback.format_exc()
# in Python 2, you can also fr...
NumPy or Pandas: Keeping array type as integer while having a NaN value
...Wes, is there any update on this? We run into issues that join columns are converted into either ints or floats, based on the existence of a NA value in the original list. (Creating issues later on when trying to merge these dataframes)
– Carst
Jul 23 '13 at 21...