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App Inventor 2 中文网 · 升级日志
... 沪ICP备2020034476号-2 沪公网安备31011702008921号 var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?8d287b854d737bdc880e8ddeac1b309d"; var s = document.getElementsByTagName("script")[0]; s.parentNode...
PHP: How to send HTTP response code?
...-Code: 404', true, 404);
I recommend the 2nd one. The first does work on all browsers I have tested, but some minor browsers or web crawlers may have a problem with a header line that only contains a colon. The header field name in the 2nd. variant is of course not standardized in any way and coul...
Quickly find whether a value is present in a C array?
...ned assembly language. I tend to take the path of least resistance - for small routines like this, I just write asm code and have a good idea how many cycles it will take to execute. You may be able to fiddle with the C code and get the compiler to generate good output, but you may end up wasting lo...
How can I set the request header for curl?
...;q=0.8,en;q=0.6' \
-e localhost \
-A 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.65 Safari/537.36' \
'http://restapi.some-site.com/getsomething?argument=value&argument2=value'
In this example the referer (-e or --referer in curl) is '...
What is the correct way to get a subarray in Scala?
...
An example of extracting specific columns from a 2D Scala Array (original_array):
import scala.collection.mutable.ArrayBuffer
val sub_array = ArrayBuffer[Array[String]]()
val columns_subset: Seq[String] = Seq("ColumnA", "ColumnB", "ColumnC")
val columns_original = original_array(0)
for (column_...
Can't use Swift classes inside Objective-C
... -Swift.h file, only the bridging headers. So I created it, but it's actually empty.
I can use all my ObjC classes in Swift, but I can't do it vice versa. I marked my swift class with @objc but it didn't help. What can I do now?
...
Python “SyntaxError: Non-ASCII character '\xe2' in file”
...ing in the "UTF-8 Bytes" column which starts with %E2 is a candidate. Generally the issue is editing code with "smart" features turned on like "smart quotes" replacing " with “ (U+201C) and ” (U+201D) or turning -- into — (U+2014 em dash). All of those start with "\xe2\x80" in UTF-8.
...
How to call a PHP function on the click of a button
...essfully");
});
});
});
In ajax.php
<?php
if (isset($_POST['action'])) {
switch ($_POST['action']) {
case 'insert':
insert();
break;
case 'select':
select();
break;
}
}
...
Changing default encoding of Python?
...on ASCII being the default (this code can be third-party, which would generally make fixing it impossible or dangerous).
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What’s the difference between ScalaTest and Scala Specs unit test frameworks?
...calaTest, and that I think reflects a difference in design attitude. I actually cut probably 2/3 of the matcher syntax I built and considered for release. I will add more matchers in future releases, but wanted to be sure I knew users actually wanted something before I added it. However ScalaTest's ...