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What linux shell command returns a part of a string? [duplicate]
I want to find a linux command that can return a part of the string. In most programming languages, it's the substr() function. Does bash have any command that can be used for this purpose. I want to be able to do something like this...
substr "abcdefg" 2 3 - prints cde .
...
How do I remove code duplication between similar const and non-const member functions?
... {
// Two lines -- one cast. This is slightly less ugly but takes an extra line.
const X& constMe = *this;
return const_cast<Z&>( constMe.z(index) );
}
#endif
};
NOTE: It is important that you do NOT put the logic in the non-const function and have the const-fun...
How do I do a case-insensitive string comparison?
How can I do case insensitive string comparison in Python?
9 Answers
9
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Why is C so fast, and why aren't other languages as fast or faster? [closed]
... this post:
In Delphi I could write this:
function RemoveAllAFromB(a, b: string): string;
var
before, after :string;
begin
Result := b;
if 0 < Pos(a,b) then begin
before := Copy(b,1,Pos(a,b)-Length(a));
after := Copy(b,Pos(a,b)+Length(a),Length(b));
Result := before + after;
...
C++ convert hex string to signed integer
I want to convert a hex string to a 32 bit signed integer in C++.
9 Answers
9
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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
MessageBuffer.cpp
//MessageBuffer.cpp
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <pthread.h>
#include "MessageBuffer.h"
MessageBuffer::MessageBuffer() {
toStop = false;
pthread_mutex_init(&mutex,NULL);//初始化互斥量
pthread_cond_init(&condition,NULL)...
Lazy Method for Reading Big File in Python?
...
What if the file is one huge string?
– MattSom
May 14 at 16:07
add a comment
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C++ : why bool is 8 bits long?
...or booleans, in a way. I seem to remember Pascal implementing sets as bit strings. That is, for the following set:
{1, 2, 5, 7}
You might have this in memory:
01100101
You can, of course, do something similar in C / C++ if you want. (If you're keeping track of a bunch of booleans, it could ...
Make first letter of a string upper case (with maximum performance)
...
Updated to C# 8
public static class StringExtensions
{
public static string FirstCharToUpper(this string input) =>
input switch
{
null => throw new ArgumentNullException(nameof(input)),
"" => throw new Argume...
Converting any string into camel case
How can I convert a string into camel case using javascript regex?
33 Answers
33
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