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Intelligent way of removing items from a List while enumerating in C#
...from it then I suggest simply using a while loop instead of a foreach
var index = 0;
while (index < myList.Count) {
if (someCondition(myList[index])) {
myList.RemoveAt(index);
} else {
index++;
}
}
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...
Python pandas: fill a dataframe row by row
...of the elements)
In [7]: df = pandas.DataFrame(columns=['a','b','c','d'], index=['x','y','z'])
In [8]: df.loc['y'] = pandas.Series({'a':1, 'b':5, 'c':2, 'd':3})
In [9]: df
Out[9]:
a b c d
x NaN NaN NaN NaN
y 1 5 2 3
z NaN NaN NaN NaN
...
How to display pandas DataFrame of floats using a format string for columns?
...= pd.DataFrame([123.4567, 234.5678, 345.6789, 456.7890],
index=['foo','bar','baz','quux'],
columns=['cost'])
print(df)
yields
cost
foo $123.46
bar $234.57
baz $345.68
quux $456.79
but this only works if you want every float to be formatted with a d...
程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...们要对LOVE加密，我们可以先定义字母的顺序ABCDEFGHIJKLMNOPQRSTUVWXYZ，然后我们让每个字母向后移动两位，那么LOVE就变为了NQXG
L------>N
O------>Q
V------>X
E------>
LOVE--->NQXG
我想这就是最简单的加密方式。
密钥加密技术的密码体...
Accessing elements of Python dictionary by index
...alues() on a dict to get a list of the inner dicts and thus access them by index.
>>> mydict = {
... 'Apple': {'American':'16', 'Mexican':10, 'Chinese':5},
... 'Grapes':{'Arabian':'25','Indian':'20'} }
>>>mylist = list(mydict.values())
>>>mylist[0]
{'American':'16', '...
Keep file in a Git repo, but don't track changes
... you do not want to be tracked and use the following command:
git update-index --assume-unchanged FILE_NAME
and if you want to track the changes again use this command:
git update-index --no-assume-unchanged FILE_NAME
git-update-index documentation
...
Adding div element to body or document in JavaScript
... += '<div style="position:absolute;width:100%;height:100%;opacity:0.3;z-index:100;background:#000;"></div>';
instead of
document.body.innerHTML = '<div style="position:absolute;width:100%;height:100%;opacity:0.3;z-index:100;background:#000;"></div>';
Edit:-
Ideally you ...
Pandas groupby: How to get a union of strings
... @VineeshTP: Column A was used as the grouping column, so it's in the index, as you can see in the example. You could get it back out as a column by using .reset_index().
– BrenBarn
Oct 9 '19 at 3:57
...
Why am I getting ibtool failed with exit code 255?
...nswered Mar 14 '13 at 23:42
Jay Q.Jay Q.
4,86133 gold badges2828 silver badges3636 bronze badges
...
Get specific ArrayList item
...Also, be careful with the arrays indices: in Java, the first element is at index 0. So if you are trying to get the third element, your solution would be mainList.get(2);
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