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游戏中的算法与计算思维 03：用洗牌理解随机与循环 · App Inventor 2 中文网
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Width=Fill parent；FontSize=24；TextColor=#183153；Text=记忆翻牌 · 第 3课
逐步搭建
先生成完整成对牌组，再从 length(牌) 到 2 倒序循...
Set transparent background using ImageMagick and commandline prompt
...owing:
convert test.png -transparent white transparent.png
That changed all the white in the test.png to transparent.
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finding and replacing elements in a list
I have to search through a list and replace all occurrences of one element with another. So far my attempts in code are getting me nowhere, what is the best way to do this?
...
C++ lambda with captures as a function pointer
... @KerrekSB put the global variables in a namespace and mark them as thread_local, that's the ftw approach I chose for solving something similar.
– Kjell Hedström
Apr 21 '14 at 15:08
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Send POST data on redirect with JavaScript/jQuery? [duplicate]
Basically what I want to do is send POST data when I change the window.location , as if a user has submitted a form and it went to a new page. I need to do it this way because I need to pass along a hidden URL, and I can’t simply place it in the URL as a GET for cosmetic reasons.
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When should one use HTML entities?
This has been confusing me for some time. With the advent of UTF-8 as the de-facto standard in web development I'm not sure in which situations I'm supposed to use the HTML entities and for which ones should I just use the UTF-8 character. For example,
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How to get a password from a shell script without echoing
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Some shells allow you to specify the prompt for the read command: read -s -p "Password:" password
– Gordon Davisson
Oct 20 '10 at 19:40
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Convert seconds to Hour:Minute:Second
...
here you go
function format_time($t,$f=':') // t = seconds, f = separator
{
return sprintf("%02d%s%02d%s%02d", floor($t/3600), $f, ($t/60)%60, $f, $t%60);
}
echo format_time(685); // 00:11:25
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Measure and Benchmark Time for Ruby Methods
...justments to the system clock, so it's a best practice to use Process.clock_gettime(Process::CLOCK_MONOTONIC) instead. But for rough calculations this doesn't matter. blog.dnsimple.com/2018/03/elapsed-time-with-ruby-the-right-way
– Patrick Brinich-Langlois
Feb ...
How can I disable HREF if onclick is executed?
...ttribute:
<a href="https://example.com/no-js-login" onclick="return yes_js_login();">Log in</a>
yes_js_login = function() {
// Your code here
return false;
}
Example: https://jsfiddle.net/FXkgV/289/
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