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编程基础与事件状态 01：让按钮响应你的任务 · App Inventor 2 中文网
...文本输入框_任务、按钮_开始、标签_状态，给输入框设置提示。
在按钮的 Click 中先 trim 去掉两边空格；空任务显示“请填写任务”。
合法输入通过 join 拼成“开始：任务”，设给标签的 Text。
输入三个空格、正常任务分别...
Print a list of all installed node.js modules
... the functions? I tried npm.commands.ls(["depth=0"], ... ) but it gives me error and npm.commands.ls(["prod"], ... ) gives me an empty array....
– Giuliano Collacchioni
Jul 1 at 17:33
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(grep) Regex to match non-ASCII characters?
... PCRE.
– Alix Axel
Jan 23 '10 at 20:05
10
That's exactly right. However you have to use pcregrep,...
Replace whitespaces with tabs in linux
...
arg. I had to use trial and error to make the sed work. I have no idea why I had to escape the plus sign like this: ls -l | sed "s/ \+/ /g"
– Jess
Apr 11 '13 at 19:37
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How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
... browser validation for SSL protocols (Poodle vulnerability) gives me: ssl_error_no_cypher_overlap. Any ideas?
– will824
May 28 '15 at 22:34
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Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
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– Steve Campbell
Sep 10 '12 at 13:05
1
This is great, just misses the root element. Add this to...
Precise Financial Calculation in JavaScript. What Are the Gotchas?
...y integer arithmetic in floating-point is exact, so decimal representation errors can be avoided by scaling1.
Note that while the set of real numbers is infinite, only a finite number of them (18,437,736,874,454,810,627 to be exact) can be represented exactly by the JavaScript floating-point format...
Maximum length for MySQL type text
I'm creating a form for sending private messages and want to set the maxlength value of a textarea appropriate to the max length of a text field in my MySQL database table. How many characters can a type text field store?
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Angular JS: What is the need of the directive’s link function when we already had directive’s contro
...ith the parent directive.
Moreover, if such a controller is not found, an error will be raised.
Why use link at all
There is no real need to use the link function if one is defining the controller since the $scope is available on the controller. Moreover, while defining both link and controller, ...
How to compare UIColors?
I'd like to check the color set for a background on a UIImageView. I've tried:
20 Answers
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