大约有 3,000 项符合查询结果（耗时：0.0200秒） [XML]
Clang optimization levels
On gcc, the manual explains what -O3 , -Os , etc. translate to in terms of specific optimisation arguments ( -funswitch-loops , -fcompare-elim , etc.)
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Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
...uninstall 2.1.2 rbenv install 2.1.2 bundle
– jeffsaracco
Sep 10 '14 at 13:18
4
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Why do we need virtual functions in C++?
... void eat() { std::cout << "I'm eating generic food."; }
};
class Cat : public Animal
{
public:
void eat() { std::cout << "I'm eating a rat."; }
};
In your main function:
Animal *animal = new Animal;
Cat *cat = new Cat;
animal->eat(); // Outputs: "I'm eating generic...
Replace multiple strings with multiple other strings
...tiple words in a string with multiple other words. The string is "I have a cat, a dog, and a goat."
18 Answers
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Concatenating multiple text files into a single file in Bash
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This appends the output to all.txt
cat *.txt >> all.txt
This overwrites all.txt
cat *.txt > all.txt
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Create Windows service from executable
...rvice Manager ) to run a .BAT or any .EXE file as a service.
http://nssm.cc/
Step 1: Download NSSM
Step 2: Install your sevice with nssm.exe install [serviceName]
Step 3: This will open a GUI which you will use to locate your executable
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What is the difference between up-casting and down-casting with respect to class variable
...ClassCastExceptions:
Animal animal = getAnimal(); // Maybe a Dog? Maybe a Cat? Maybe an Animal?
if (animal instanceof Dog) {
// Guaranteed to succeed, barring classloader shenanigans
Dog castedDog = (Dog) animal;
}
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PHP - Extracting a property from an array of objects
I've got an array of cats objects:
10 Answers
10
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How to send email to multiple recipients using python smtplib?
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This should be the accepted answer, as it actually explains the why and the how.
– Serrano
Sep 1 '16 at 12:34
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Object.getOwnPropertyNames vs Object.keys
...s constructor when creating object. Here is something that got me.
const cat1 = {
eat() {},
sleep() {},
talk() {}
};
// here the methods will be part of the Cat Prototype
class Cat {
eat() {}
sleep() {}
talk() {}
}
const cat2 = new Cat()
Object.keys(cat1) // ["eat", "sle...