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Meaning of $? (dollar question mark) in shell scripts
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$? returns the exit value of the last executed command. echo $? prints that value on console. zero implies a successful execution while non-zero values are mapped to various reason for failure.
Hence when scripting; I tend to use the following syntax
if [ $? -eq 0 ]; then
# do something...
How do I read / convert an InputStream into a String in Java?
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Did the toString get deprecated? I see IOUtils.convertStreamToString()
– RCB
Jul 2 at 15:26
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C++ convert vector to vector
What is a good clean way to convert a std::vector<int> intVec to std::vector<double> doubleVec . Or, more generally, to convert two vectors of convertible types?
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How to log source file name and line number in Python
Is it possible to decorate/extend the python standard logging system, so that when a logging method is invoked it also logs the file and the line number where it was invoked or maybe the method that invoked it?
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Are C++ enums signed or unsigned?
...operands using the < operator, we are actually talking about implicitly converting the enum type to some integral type. It is the sign of this integral type that matters. And when converting enum to integral type, this statement applies:
9 The value of an enumerator or an object of an enumeratio...
How to convert a Java 8 Stream to an Array?
What is the easiest/shortest way to convert a Java 8 Stream into an array?
10 Answers
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TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
... USE_SBRK (0) */
/*#define USE_MMAP (0) */
#ifndef USE_PRINTF
#define USE_PRINTF (1)
#endif
#include <string.h>
#ifndef TLSF_USE_LOCKS
#define TLSF_USE_LOCKS (0)
#endif
#ifndef TLSF_STATISTIC
#define TLSF_STATISTIC (0)
#endif
#ifndef USE_MMAP
#define USE_M...
how to convert array values from string to int?
returns
14 Answers
14
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Cast List to List in .NET 2.0
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.NET 2.0 has the ConvertAll method where you can pass in a converter function:
List<int> l1 = new List<int>(new int[] { 1, 2, 3 } );
List<string> l2 = l1.ConvertAll<string>(delegate(int i) { return i.ToString(); })...
Can we define implicit conversions of enums in c#?
...ic static implicit operator AccountStatus(byte value)
{
return Convert(value);
}
}
The base class (RichEnum) is listed below.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using Sy...