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Objective-C : BOOL vs bool
...
From the definition in objc.h:
#if (TARGET_OS_IPHONE && __LP64__) || TARGET_OS_WATCH
typedef bool BOOL;
#else
typedef signed char BOOL;
// BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
// even if -funsigned-char is used.
#endif
#define YES ((BOOL)1)
#define NO...
No ConcurrentList in .Net 4.0?
...atively slight added overhead. When the list expands from e.g. size 32 to 64, keep the size-32 array and create a new size-64 array. When adding each of the next 32 items, put it in slot a 32-63 of the new array and copy an old item from the size-32 array to the new one. Until the 64th item is ad...
Eclipse returns error message “Java was started but returned exit code = 1”
... eclipse bitness.
32-bit OS , 32-bit JDK , 32-bit Eclipse (32-bit only)
64-bit OS , 32-bit JDK , 32-bit Eclipse
64-bit OS , 64-bit JDK , 64bit Eclipse (64-bit only)
Kindly use 1 of the above combinations.
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How do I get the row count of a pandas DataFrame?
...eturn non-NaN counts for each column:
df.count()
A 5
B 3
dtype: int64
For Series, use Series.count to similar effect:
s.count()
# 3
Group-wise Row Count: GroupBy.size
For DataFrames, use DataFrameGroupBy.size to count the number of rows per group.
df.groupby('A').size()
A
a 2
b ...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...calhost (127.0.0.1): 48 data bytes
56 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.096 ms
56 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.088 ms
56 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.088 ms
^C--- localhost ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
...
What represents a double in sql server?
... a 128-bit floating point number.
MSSQL's float type is equivalent to the 64-bit double type in .NET. (My original answer from 2011 said there could be a slight difference in mantissa, but I've tested this in 2020 and they appear to be 100% compatible in their binary representation of both very sma...
Problem in running .net framework 4.0 website on iis 7.0
... actually, I don't even have the CGI option. I am using windows 7, 64 bit. Trying to get ssrs to work.
– Steam
Mar 11 '14 at 5:40
...
HttpWebRequest using Basic authentication
...der yourself.
Just make the name "Authorization" and the value "Basic BASE64({USERNAME:PASSWORD})"
String username = "abc";
String password = "123";
String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + password));
httpWebRequest.He...
Java equivalent of unsigned long long?
In C++, I enjoyed having access to a 64 bit unsigned integer, via unsigned long long int , or via uint64_t . Now, in Java longs are 64 bits, I know. However, they are signed.
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Difference between size_t and unsigned int?
...int because the size of int is specified by the data model. For example LLP64 uses a 32-bit int and ILP64 uses a 64-bit int.
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