大约有 570 项符合查询结果（耗时：0.0264秒） [XML]
Numpy: find first index of value fast
...i++){
if (data[i] == val)
return(i);
}
return(-999);
}
and the python:
# to compile (mac)
# gcc -shared index.c -o index.dylib
import ctypes
lib = ctypes.CDLL('index.dylib')
lib.index.restype = ctypes.c_long
lib.index.argtypes = (ctypes.c_long, ctypes.POINTER(ctypes.c_...
How to deal with floating point number precision in JavaScript?
...(number).toPrecision(12));
}
Unlike Pedros solution this will round up 0.999...repeating and is accurate to plus/minus one on the least significant digit.
Note: When dealing with 32 or 64 bit floats, you should use toPrecision(7) and toPrecision(15) for best results. See this question for info a...
Calculating days between two dates with Java
...ote that TimeUnit.Days.convert() will ignore remaining units eg converting 999 milliseconds to seconds results in 0. This means that if you use new Date() as one of the Date objects you might get one day less so take care
– Klitos G.
Jun 3 '16 at 11:38
...
New features in java 7
...
Underscore in numeric literals
int val 12_15;
long phoneNo = 01917_999_720L;
Using single catch statement for throwing multiple exception by using “|” operator
catch(IOException | NullPointerException ex){
ex.printStackTrace();
}
No need to close() resources b...
What regular expression will match valid international phone numbers?
...numbering plan. This only ensures that the country code is valid.
^011(999|998|997|996|995|994|993|992|991|
990|979|978|977|976|975|974|973|972|971|970|
969|968|967|966|965|964|963|962|961|960|899|
898|897|896|895|894|893|892|891|890|889|888|
887|886|885|884|883|882|881|880|879|878|877|
...
Can I set background image and opacity in the same property?
...n: relative;
}
.bg-container .content{
position: absolute;
z-index:999;
text-align: center;
width: 100%;
}
.bg-container::after{
content: "";
position: absolute;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
z-index:-99;
background-image: url(https://i.stack...
How to round up to the nearest 10 (or 100 or X)?
... for example a number between 101-500 would roundup to 500 and numbers 501-999 would roundUp to 1000? instead of all rounding to 1000?
– helen.h
Mar 11 '16 at 10:25
...
Is it good practice to use java.lang.String.intern()?
...bjects of "Hello" in Heap and i perform intern() on one of them, then rest 999 objects will be destroyed automatically?
– Arun Raaj
Mar 23 '18 at 12:28
...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，在每加入一个学生的时候都需要在两个map中各插入一个元素，移除的时候亦是，这种方法比最初的方法要好一些了，至少它可以做到高效的双向查找，但是仍然还是有缺陷的，比如说维护起来很麻烦，每次操作时都需要同时关...
jQuery load more data on scroll
...t;
<style>
#myScroll {
border: 1px solid #999;
}
p {
border: 1px solid #ccc;
padding: 50px;
text-align: center;
}
.loading {
color: red;
}
.dynamic {
...