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How to get line count of a large file cheaply in Python?
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645
One line, probably pretty fast:
num_lines = sum(1 for line in open('myfile.txt'))
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Programmatically get own phone number in iOS
... What's the best reason you have seen for Apple disallowing permission-based access to the user's phone number? Apple already allows permission-based access to contacts, photos, location, and the user's camera and microphone. Why not the phone number? There must be a good reason, but it's not im...
Move capture in lambda
...000DFDD172280
object was deleted
Well, the pointer address may vary. ;)
Demo
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How do I replace NA values with zeros in an R dataframe?
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The dplyr hybridized options are now around 30% faster than the Base R subset reassigns. On a 100M datapoint dataframe mutate_all(~replace(., is.na(.), 0)) runs a half a second faster than the base R d[is.na(d)] <- 0 option. What one wants to avoid specifically is using an ifelse() or ...
How to use phpexcel to read data and insert into database?
...romString($highestColumn);
$nrColumns = ord($highestColumn) - 64;
$worksheetTitle = $worksheet->getTitle();
echo "<br>The worksheet ".$worksheetTitle." has ";
echo $nrColumns . ' columns (A-' . $highestColumn . ') ';
echo ' and ' . $highestRow . ' row.';
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When should I use the “strictfp” keyword in java?
... "decimal point numbers also known as floating point" -- Decimal means base 10, and has nothing to do with floating point representations.
– aioobe
Dec 1 '19 at 15:34
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Is there a command to refresh environment variables from the command prompt in Windows?
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It works for me in PowerShell, @craq . Running Windows10 x64.
– mazunki
Mar 15 '19 at 23:08
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ASP.NET WebApi vs MVC ? [closed]
...care of returning data in particular format like
JSON,XML or any other based upon the Accept header in the request
and you don't worry about that. MVC only return data in JSON format
using JsonResult.
4. In Web API the request are mapped to the actions based on HTTP verbs
but in MVC...
Can I delete a git commit but keep the changes?
... features I was working on, I had to switch my current branch to master to demo some features. But just using a "git checkout master" preserved the changes I also made in my development branch, thus breaking some of the functionality in master. So what I did was commit the changes on my development ...
astah（原jude）建模软件64bit社区版 - 软件下载 - 清泛网 - 专注C/C++及内核技术
astah（原jude）建模软件64bit社区版astah_jude_community_editionastah jude 建模对日开发常用的建模软件astah（原名：jude），社区版，免费使用，不可用做商业用途。
对日开发常用的建模软件astah（原名：jude），社区版，免费使用（功能...