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How do you know when to use fold-left and when to use fold-right?
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The extra stack frames will definitely make a difference for large lists. If your stack frames exceed the size of the processor's cache, then your cache-misses are going to affect performance. Unless the list is doubly-linked, it...
Quickly find whether a value is present in a C array?
... In this case we are preventing an attacker from guessing the length of a string. Usually the attacker will take several million samples of a function invocation to perform a timing attack.
– OregonTrail
Sep 5 '14 at 17:19
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Why would someone use WHERE 1=1 AND in a SQL clause?
...;conditions> in a SQL clause (Either SQL obtained through concatenated strings, either view definition)
19 Answers
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Difference between __getattr__ vs __getattribute__
...you'll have a hard time supporting "self.foo" syntax within your methods.
Extra info: http://www.devx.com/opensource/Article/31482/0/page/4
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TypeError: got multiple values for argument
...sed and delegates the drawing of the box to another function, relaying all extra arguments.
def color_box(color, *args, **kwargs):
painter.select_color(color)
painter.draw_box(*args, **kwargs)
Then the call
color_box("blellow", color="green", height=20, width=30)
will fail because two ...
How to change letter spacing in a Textview?
...ntent.Context;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ScaleXSpan;
import android.util.AttributeSet;
import android.widget.TextView;
public class LetterSpacingTextView extends TextView {
private float letterSpacing = LetterSpacing.BIGGEST;
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C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...&15;
printf("a=%d\tb=%d\n",a,b);
}
请再看一例!
main(){
char a='a',b='b';
int p,c,d;
p=a;
p=(p<<8)|b;
d=p&0xff;
c=(p&0xff00)>>8;
printf("a=%d\nb=%d\nc=%d\nd=%d\n",a,b,c,d);
}
六、 右移运算符(>>)
1、运算规则
用来将一个...
How to send a command to all panes in tmux?
...p a key binding - without the prefix, if you like - to toggle and focus an extra pane with your shell of choice, instead of sending <prefix>: before each command, losing the output after leaving the command, and all of the pitfalls that come with executing through Tmux. For example, <prefix...
Why does the indexing start with zero in 'C'?
...s the operand of the sizeof operator, or the unary & operator, or is a string literal used to initialize an array, an expression that has type "array of type" is converted to an expression with type "pointer to type" that points to the initial element of the array object and is not an lvalue. If...
How to check if a string contains only digits in Java [duplicate]
In Java for String class there is a method called matches, how to use this method to check if my string is having only digits using regular expression. I tried with below examples, but both of them returned me false as result.
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