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Building big, immutable objects without using constructors having long parameter lists
...ore instances than necessary - isn't really that much of a problem. Object allocation is very cheap, as is garbage collection of short-lived objects. When escape analysis is enabled by default, this kind of "intermediate objects" are likely to be stack allocated and cost literally nothing to create....
How can I get browser to prompt to save password?
... will offer to save the password.
<form id="loginform" action="login.php" onSubmit="return login(this);">
<input name="username" type="text" />
<input name="password" type="password" />
<input name="doLogin" type="submit" value="Login" />
</form>
Using this met...
How to copy Java Collections list
...hen it will throw an IndexOutOfBoundsException. The expectation is that no allocations will be required by Collections.copy to work, and if any are, then it throws that exception. It's an optimization to require the copied collection to be preallocated (b), but I generally do not think that the feat...
Javascript : Send JSON Object with Ajax?
...
With jQuery:
$.post("test.php", { json_string:JSON.stringify({name:"John", time:"2pm"}) });
Without jQuery:
var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-...
Using generic std::function objects with member functions in one class
... in size, assigning this to an std::function will result in dynamic memory allocation.
On the other hand, a lambda that captures this is only one pointer in size, assigning it to an std::function will not result in dynamic memory allocation with g++.
While I have not verified this with other compi...
Are HTTP headers case-sensitive?
In a blog post I use the following PHP to set the content-type of a response:
8 Answers
...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
内存优化总结:ptmalloc、tcmalloc和jemallocmemory-optimize需求系统的物理内存是有限的，而对内存的需求是变化的, 程序的动态性越强，内存管理就越重要，选择合适的内存管理算法会带来明显的性能提升。比如nginx， 它在每个连接accept...
JavaScript implementation of Gzip [closed]
...ad>
<body>
<script>
document.write(JXG.decompress('<?php
echo base64_encode(gzencode("Try not. Do, or do not. There is no try."));
?>'));
</script>
</html>
I understand it is not what you wanted but I still reply here because I suspect it will hel...
What happens if I define a 0-size array in C/C++?
...ray {
size_t size;
int content[];
};
The idea is that you would then allocate it so:
void foo(size_t x) {
Array* array = malloc(sizeof(size_t) + x * sizeof(int));
array->size = x;
for (size_t i = 0; i != x; ++i) {
array->content[i] = 0;
}
}
You might also use it staticall...
NSDate get year/month/day
...force a Gregorian calendar, you'll want to use the following: [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]
– Itai Ferber
Jun 9 '13 at 21:01
2
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