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Is there a NumPy function to return the first index of something in an array?
...eals naturally with multidimensional arrays:
>>> arr1 = np.ones((100, 100, 100))
>>> arr1[2, 2, 2] = 2
>>> index(arr1, 2)
(2, 2, 2)
>>> arr2 = np.ones(20)
>>> arr2[5] = 2
>>> index(arr2, 2)
(5,)
This can be much faster (because it's short-c...
Find and replace string values in list
...approaches, here are some timings:
In [1]: words = [str(i) for i in range(10000)]
In [2]: %timeit replaced = [w.replace('1', '<1>') for w in words]
100 loops, best of 3: 2.98 ms per loop
In [3]: %timeit replaced = map(lambda x: str.replace(x, '1', '<1>'), words)
100 loops, best of 3: ...
【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ze: 10px; 时，此时 1rem = 10px，所以 box 盒子的宽高分别为：100px 和 200px;
当我们把 html 中 font-size: 20px; 时，此时 1rem = 20px,此时 box 盒子的宽高就为 200px 和 400px;
2、实际开发中如何适配，如何将设计稿对应的 px 单位转换为 rem 单...
How to style a div to be a responsive square? [duplicate]
...either portrait or landscape view: ``` @media (orientation:portrait){width:100vw; height:100vw;} @media (orientation:landscape){width:100vh; height:100vh;} ```
– MoonLite
Jun 16 '17 at 12:55
...
Split function equivalent in T-SQL?
...
Try this
DECLARE @xml xml, @str varchar(100), @delimiter varchar(10)
SET @str = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15'
SET @delimiter = ','
SET @xml = cast(('<X>'+replace(@str, @delimiter, '</X><X>')+'</X>') as xml)
SELECT C.value('.', 'varch...
How to detect internet speed in JavaScript?
... function showResults() {
var duration = (endTime - startTime) / 1000;
var bitsLoaded = downloadSize * 8;
var speedBps = (bitsLoaded / duration).toFixed(2);
var speedKbps = (speedBps / 1024).toFixed(2);
var speedMbps = (speedKbps / 1024).toFixed(2);
...
MySQL vs MongoDB 1000 reads
...
Do you have concurrency, i.e simultaneous users ? If you just run 1000 times the query straight, with just one thread, there will be almost no difference. Too easy for these engines :)
BUT I strongly suggest that you build a true load testing session, which means using an injector such as ...
jQuery scroll to element
...);
});
</script>
<div id="div1" style="height: 1000px; width 100px">
Test
</div>
<br/>
<div id="div2" style="height: 1000px; width 100px">
Test 2
</div>
<button id="click">Click me</button>
...
How to calculate the number of occurrence of a given character in each row of a column of strings?
... up size of the test to 3000 rows)
q.data<-q.data[rep(1:NROW(q.data), 1000),]
str(q.data)
'data.frame': 3000 obs. of 3 variables:
$ number : int 1 2 3 1 2 3 1 2 3 1 ...
$ string : Factor w/ 3 levels "greatgreat","magic",..: 1 2 3 1 2 3 1 2 3 1 ...
$ number.of.a: int 2 1 0 2 1 0...
How do I write LINQ's .Skip(1000).Take(100) in pure SQL?
...ER BY ...) as row_number
FROM Table) t0
WHERE to.row_number BETWEEN 1000 and 1100;
This works, but the need to manufacture the row_number from the ORDER BY may result in your query being sorted on the server side and cause performance problems. Even when an index can satisfy the ORDER BY re...