大约有 5,600 项符合查询结果（耗时：0.0177秒） [XML]
Practical non-image based CAPTCHA approaches?
...a.value) + 1;
}
}
setTimeout("antiSpam()", 1000);
}
antiSpam();
Then when the form is submitted, If the antispam value is still "lalalala", then I mark it as spam. If the antispam value is an integer, I check to see if it is above something like 10 (seconds). If it...
What is the proper #include for the function 'sleep()'?
... On UNIX, Sleep is actually usleep and it takes microseconds (milliseconds*1000) instead of seconds.
– Agostino
Feb 6 '17 at 14:59
6
...
Linear Regression and group by in R
...048 0.13515755 0.1980687 0.8479318
# 3 NY (Intercept) -0.35135766 0.60100314 -0.5846187 0.5749166
# 4 NY year 0.09385309 0.09686043 0.9689519 0.3609470
fitted_models %>% glance(model)
# Source: local data frame [2 x 12]
# Groups: state [2]
#
# state r.squared adj.r.squared...
List comprehension vs map
...ctly the same function:
$ python -mtimeit -s'xs=range(10)' 'map(hex, xs)'
100000 loops, best of 3: 4.86 usec per loop
$ python -mtimeit -s'xs=range(10)' '[hex(x) for x in xs]'
100000 loops, best of 3: 5.58 usec per loop
An example of how performance comparison gets completely reversed when map ne...
calculating the difference in months between two dates
...se? so if you are referring to particular, known months, then my method is 100% accurate and you're would be an approximation, however, if you are referring to a month in general, you're approximation would be a better idea, and mine would just be a bad idea (it isn't made for that and there would b...
Why does parseInt yield NaN with Array#map?
...Int's radix parameter.
If you're using underscore you can do:
['10','1','100'].map(_.partial(parseInt, _, 10))
Or without underscore:
['10','1','100'].map(function(x) { return parseInt(x, 10); });
share
|
...
Programmatically set height on LayoutParams as density-independent pixels
...
/**
* Get conversion rate from dp into px.<br>
* E.g. to convert 100dp: px = (int) (100 * convRate);
* @param context e.g. activity
* @return conversion rate
*/
public static float convRateDpToPx(Context context) {
return context.getResources().getDisplayMetrics().densityDpi / 160f;...
How are feature_importances in RandomForestClassifier determined?
...-(0+3*0.444)) + (3*0.444-(0+0)))
print("petal width (cm)",(150* 0.667 - (0+100*0.5)) +(100*0.5-(54*0.168+46*0.043))+(6*0.444 -(0+3*0.444)) + (48*0.041-(0+0)))
We get feature_importance: np.array([0,1.332,6.418,92.30]).
After normalized, we can get array ([0., 0.01331334, 0.06414793, 0.92253873]),t...
Difference between abstraction and encapsulation?
...
+100
Most answers here focus on OOP but encapsulation begins much earlier:
Every function is an encapsulation; in pseudocode:
point x ...
Avoid trailing zeroes in printf()
..., it won't cause a problem (at least for that value) since the resultant 0.10000000000000000555 will be 0.1 when stripped back. The problem may come if you have a value slightly under such as if the closest representation of 42.1 was 42.099999999314159. If you really wanted to handle that, then you'...