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How to sort two lists (which reference each other) in the exact same way
...ine for small lists:
>>> %timeit zip(*sorted(zip(list1, list2)))
100000 loops, best of 3: 3.3 us per loop
>>> %timeit tups = zip(list1, list2); tups.sort(); zip(*tups)
100000 loops, best of 3: 2.84 us per loop
On the other hand, for larger lists, the one-line version could be fa...
你真的了解熊市有多么可怕吗？ - 创意 - 清泛网 - 专注C/C++及内核技术
...小时跌了46%还多。有的股票在一周内的成交量为零。来了100个贼，被消灭了95个，剩下的成了精，死不了，活下来了。
熊市的初级阶段：经历股价的大幅上涨以后，很多股票长了几倍甚至几十倍，这时候市场上该炒的股票都炒...
SVG get text element width
...yle.fontFamily = 'YOUR_FONT_GOES_HERE';
div.style.fontSize = '100';
div.style.border = "1px solid blue"; // for convenience when visible
div.innerHTML = "YOUR STRING";
document.body.appendChild(div);
var offsetWidth = d...
How many files can I put in a directory?
...t time of 200-400 ms. As a comparison on another site I have with a around 100 files in a directory the image is displayed after just ~40ms of waiting.
I've given this answer as most people have just written how directory search functions will perform, which you won't be using on a thumb folder - j...
How to TryParse for Enum value?
...is available from MSDN: msdn.microsoft.com/library/vstudio/dd991317%28v=vs.100%29.aspx
– Christian
Sep 19 '13 at 9:36
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The performance impact of using instanceof in Java
...etClass() == _.class implementation
I used jmh to run the benchmark with 100 warmup calls, 1000 iterations under measuring, and with 10 forks. So each option was measured with 10 000 times, which takes 12:18:57 to run the whole benchmark on my MacBook Pro with macOS 10.12.4 and Java 1.8. The bench...
List of ANSI color escape sequences
...erm (not in standard) ║
║ 100–107 ║ Set bright background color ║ aixterm (not in standard) ║
╚══════════╩═════════════════════...
What is “vectorization”?
...thmetic operation. eg. if we want to add 10 to value if it is greater then 100. we can either.
if(x[i] > 100) x[i] += 10; // this will branch execution flow.
or we can model the condition into arithmetic operation creating a condition vector c,
c[i] = x[i] > 100; // storing the condition ...
How to find the length of a string in R
... uq max neval
nchar(x) 11.868 12.776 13.1590 13.6475 41.815 100
str_length(x) 30.715 33.159 33.6825 34.1360 173.400 100
stri_length(x) 2.653 3.281 4.0495 4.5380 19.966 100
and also works fine with NA's
nchar(NA)
## [1] 2
stri_length(NA)
## [1] NA
...
Remove empty elements from an array in Javascript
...e(/(\r\n|\n|\r)/gm,"")});
Example:
arr = ["hello",0,"",null,undefined,1,100," "]
arr.filter(function(e){return e});
Return:
["hello", 1, 100, " "]
UPDATE (based on Alnitak's comment)
In some situations you may want to keep "0" in the array and remove anything else (null, undefined and "")...