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Implementing slicing in __getitem__
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121
The __getitem__() method will receive a slice object when the object is sliced. Simply look at...
warning: implicit declaration of function
... a declaration ("prototype") yet.
For example:
int main()
{
fun(2, "21"); /* The compiler has not seen the declaration. */
return 0;
}
int fun(int x, char *p)
{
/* ... */
}
You need to declare your function before main, like this, either directly or in a header:
int fun(int ...
Convert an integer to a float number
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181
There is no float type. Looks like you want float64. You could also use float32 if you only n...
How to convert a negative number to positive?
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216
>>> n = -42
>>> -n # if you know n is negative
42
>>> abs(n) ...
Deleting Files using Git/GitHub
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answered Feb 20 '10 at 0:43
Samuel Mikel BowlesSamuel Mikel Bowles
2,36911 gold badge1212 silver badges77 bronze badges
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How to parse Excel (XLS) file in Javascript/HTML5
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11 Answers
11
Active
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What do you call the -> operator in Ruby?
... lambda defined using -> is called lambda literal.
succ = ->(x){ x+1 }
succ.call(2)
The code is equivalent to the following one.
succ = lambda { |x| x + 1 }
succ.call(2)
Informally, I have heard it being called stabby lambda or stabby literal.
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Set custom attribute using JavaScript
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Use the setAttribute method:
document.getElementById('item1').setAttribute('data', "icon: 'base2.gif', url: 'output.htm', target: 'AccessPage', output: '1'");
But you really should be using data followed with a dash and with its property, like:
<li ... data-icon="base.gif" ......
What is the right way to check for a null string in Objective-C?
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edited Nov 5 '14 at 3:14
answered Jun 10 '09 at 7:45
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Appending to an existing string
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165
You can use << to append to a string in-place.
s = "foo"
old_id = s.object_id
s <<...