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Python hashable dicts
...using itervalues will access the values directly and avoid the many memory allocator calls using by items to form new many key/value tuples in memory every time you do a lookup.
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Sharing a URL with a query string on Twitter
...tion shareOnFB(){
var url = "https://www.facebook.com/sharer/sharer.php?u=https://yoururl.com&t=your message";
window.open(url, '', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=300,width=600');
return false;
}
function shareOntwitter(){
var url = 'https...
Read whole ASCII file into C++ std::string [duplicate]
...lts.
Following KeithB's point in the comments, here's a way to do it that allocates all the memory up front (rather than relying on the string class's automatic reallocation):
#include <string>
#include <fstream>
#include <streambuf>
std::ifstream t("file.txt");
std::string str;...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...应用程序会崩溃[a]，并出现类似以下错误消息：
Failed to allocate a 25165836 byte allocation with 3395432 free bytes and 3MB until OOM
这里发生的情况是应用程序内存不足（OOM）。在上述消息的情况下，手机试图分配 25 兆字节（25165836 字节），...
private final static attribute vs private final attribute
...es, Java has no pass by reference anyways). A real useful test would be to allocate two objects and change the value of a public final int FOO = 10 variable using Java reflections in a forced way. Then check if the other object has also changed its value.
– Martijn Courteaux
...
Have nginx access_log and error_log log to STDOUT and STDERR of master process
...
In docker image of PHP-FPM, i've see such approach:
# cat /usr/local/etc/php-fpm.d/docker.conf
[global]
error_log = /proc/self/fd/2
[www]
; if we send this to /proc/self/fd/1, it never appears
access.log = /proc/self/fd/2
...
capturing self strongly in this block is likely to lead to a retain cycle
...RING YOU TO RETAIN LOOP
}
};
and don't forget to do:
- (void)dealloc {
self.loadingCompletionHandler = NULL;
}
another issue can appear if you will pass weak copy of not retained by anybody object:
MyViewController *vcToGo = [[MyViewCOntroller alloc] init];
__weak MyViewController...
MySQL “WITH” clause
... a feature request for MySQL since January 2006: http://bugs.mysql.com/bug.php?id=16244
Other RDBMS products that support common table expressions:
Oracle 9i release 2 and later:
http://www.oracle-base.com/articles/misc/with-clause.php
Microsoft SQL Server 2005 and later:
http://msdn.microsoft.com/...
Real escape string and PDO [duplicate]
...escape_string() with the PDO::quote() method.
Here is an excerpt from the PHP website:
<?php
$conn = new PDO('sqlite:/home/lynn/music.sql3');
/* Simple string */
$string = 'Nice';
print "Unquoted string: $string\n";
print "Quoted string: " . $conn->quote($string) . "\n";...
Access-Control-Allow-Origin wildcard subdomains, ports and protocols
...Leaving it up to each individual user to build their own shim using custom PHP code, rewrite rules, or what-have-you is a recipe for fragmentation, bugs, and disaster. Server devs should know better than that; and if they don't, the CORS spec should force them to.
– aroth
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