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What does `unsigned` in MySQL mean and when to use it?
...onnegative numbers in a column
or when you need a larger upper
numeric range for the column. For
example, if an INT column is UNSIGNED,
the size of the column's range is the
same but its endpoints shift from
-2147483648 and 2147483647 up to 0 and 4294967295.
When do I use it ?
Ask yo...
Remove and Replace Printed items [duplicate]
...
Just use CR to go to beginning of the line.
import time
for x in range (0,5):
b = "Loading" + "." * x
print (b, end="\r")
time.sleep(1)
share
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improve this answer
...
Iterating over a numpy array
...
X = np.zeros((100, 100, 100))
%timeit list([((i,j,k), X[i,j,k]) for i in range(X.shape[0]) for j in range(X.shape[1]) for k in range(X.shape[2])])
1 loop, best of 3: 376 ms per loop
%timeit list(np.ndenumerate(X))
1 loop, best of 3: 570 ms per loop
If you are worried about the performance you c...
How to reset index in a pandas dataframe? [duplicate]
...
Another solutions are assign RangeIndex or range:
df.index = pd.RangeIndex(len(df.index))
df.index = range(len(df.index))
It is faster:
df = pd.DataFrame({'a':[8,7], 'c':[2,4]}, index=[7,8])
df = pd.concat([df]*10000)
print (df.head())
In [298]: %t...
VBA 单元格日期与当前日期比较 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...期比较的代码：& 39;日期小于今天的If IsDate(Worksheets("xxx") Range("A" & 0)) And CDate(Worksheets("xxx VBA 单元格日期与当前日期比较的代码：
'日期小于今天的
If IsDate(Worksheets("xxx").Range("A" & 0)) And CDate(Worksheets("xxx").Range("A" & 0)) < Date Then
...
MFC日历控件完全自绘MyCalendar Control - 源码下载 - 清泛网 - 专注C/C++及内核技术
...size. Next, set some calendar properties:
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calendar.SetRange( 2000, 3000 ); // Sets calendar year range
calendar.SetDate( 15, 12, 1978 ); // Sets custom date
calendar.Expand(TRUE); // Expands calendar window
After the user changes date or expands/collapses calendar window, the...
Getting random numbers in Java [duplicate]
...and.nextInt(50);
// Add 1 to the result to get a number from the required range
// (i.e., [1 - 50]).
n += 1;
Another solution is using Math.random():
double random = Math.random() * 49 + 1;
or
int random = (int)(Math.random() * 50 + 1);
...
Java generics type erasure: when and what happens?
...in the caller) to check types. The generic objects themselves are just the raw type; the parameterized type is "erased". So, when you create a new Box<Integer>(), there is no information about the Integer class in the Box object.
Angelika Langer's FAQ is the best reference I've seen for Java ...
What is q=0.5 in Accept* HTTP headers?
... 1, as can be seen from the HTTP/1.1 Specification, §14.4:
Each language-range MAY be given an associated quality value which represents an estimate of the user's preference for the languages specified by that range. The quality value defaults to "q=1". For example,
Accept-Language: da, en-gb;q=...
Difference between size_t and unsigned int?
...ed long
unsigned long long
with various requirements for their sizes and ranges (briefly, each type's range is a subset of the next type's range, but some of them may have the same range).
size_t is a typedef (i.e., an alias) for some unsigned type, (probably one of the above but possibly an exte...