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Are negative array indexes allowed in C?
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What happens on 64 bit systems (LP64) when you have a 32 bit int index which is negative ? Should the index get promoted to a 64 bit signed int prior to the address calculation ?
– Paul R
Oct 11 '10 at ...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...a look at this excellent answer: https://stackoverflow.com/a/11227902/1001643
Compilers typically don't have enough information to know which branches will alias and whether those aliases will be significant. However, that information can be determined at runtime with tools such as Cachegrind and...
How to find the type of an object in Go?
...ntln(reflect.TypeOf(tst3))
}
Output:
Hello, playground
string
int
float64
see: http://play.golang.org/p/XQMcUVsOja to view it in action.
More documentation here: http://golang.org/pkg/reflect/#Type
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How is the default max Java heap size determined?
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In my case on Linux, InitialHeapSize = 262803264 and MaxHeapSize = 4206886912 which is about 256 MB and 4 GB if I'm not mistaken. Does this mean that every JVM starts as if it was launched with -Xms256m -Xmx4g options?
– Yuriy Nakonechnyy
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Floating point vs integer calculations on modern hardware
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@JohannesSchaub-litb: SSE2 (baseline for x86-64) has packed double-precision FP. With only two 64-bit doubles per register, the potential speedup is smaller than float for code that vectorizes well. Scalar float and double use XMM registers on x86-64, with legacy x87 ...
What's the difference between window.location= and window.location.replace()?
Is there a difference between these two lines?
2 Answers
2
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How should I print types like off_t and size_t?
...77: '_snprintf_s' : format string '%jd' requires an argument of type '__int64', but variadic argument 1 has type 'off_t'"... A truely portable way is printf("%lld\n", (long long)x);
– ericcurtin
Jun 13 '18 at 16:59
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Encrypt Password in Configuration Files? [closed]
...n;
import java.security.spec.InvalidKeySpecException;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
publ...
System.BadImageFormatException: Could not load file or assembly [duplicate]
service is x86 compiled even both computers are x64 and it works on my computer. Here in server where is win 2008 i get this error.
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Convert Pandas column containing NaNs to dtype `int`
...type()). Other accepted nullable integer types are pd.Int16Dtype and pd.Int64Dtype. Pick your poison.
– cs95
Apr 2 '19 at 7:56
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