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AppInventor实现图片和文字等进行发帖和查看帖子功能 - App应用开发 - 清泛...
.../文字上传功能，要采用 网络微数据库 组件，图片要base64化，但是数据库单Key存储容量有限，最多60KB。实现方式复杂且数据有限制，只能demo级别应用。
3、使用 leandb 付费在线数据库。或者自己搭建 数据库服务器+图片服务器。...
How do I get the directory from a file's full path?
...
BrandonBrandon
64.2k2929 gold badges186186 silver badges217217 bronze badges
...
What is RSS and VSZ in Linux memory management
...out 0x1000000000 0x200000000
echo $?
sudo dmesg
where:
0x1000000000 == 64GiB: 2x my computer's physical RAM of 32GiB
0x200000000 == 8GiB: print the memory every 8GiB, so we should get 4 prints before the crash at around 32GiB
echo 1 | sudo tee /proc/sys/vm/overcommit_memory: required for Linux ...
Infinity symbol with HTML
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bradbrad
64.7k2121 gold badges6666 silver badges8484 bronze badges
add...
What would cause an algorithm to have O(log log n) complexity?
...48
2,048 / 2 = 1,024
1,024 / 2 = 512
512 / 2 = 256
256 / 2 = 128
128 / 2 = 64
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This process takes 16 steps, and it's also the case that 65,536 = 216.
But, if we take the square root at each level, we get
√65,536 = 256
√256 = 16
...
Simplest PHP example for retrieving user_timeline with Twitter API version 1.1
...p;' . rawurlencode($oauth_access_token_secret);
$oauth_signature = base64_encode(hash_hmac('sha1', $base_info, $composite_key, true));
$oauth['oauth_signature'] = $oauth_signature;
// Make requests
$header = array(buildAuthorizationHeader($oauth), 'Expect:');
$options = array( C...
Get url without querystring
...
BrandonBrandon
64.2k2929 gold badges186186 silver badges217217 bronze badges
...
Why is reading lines from stdin much slower in C++ than Python?
... 17
mmap 22
stat64 30
read_nocancel 25958
Python
./a.py < in
Read 6512402 lines in 1 seconds. LPS: 6512402
syscalls sudo dtruss -c ./a.py < in
CALL ...
Get Image Height and Width as integer values?
... rights on the directory but not the image itself (works with the image on 644).
– Lee Saxon
Jan 10 '16 at 16:15
1
...
warning: incompatible implicit declaration of built-in function ‘xyz’
... argc, char **argv) {
exit(1);
}
Compiled like this on Fedora 17 Linux 64 bit with gcc:
el@defiant ~/foo2 $ gcc -o n n2.c
n2.c: In function ‘main’:
n2.c:2:3: warning: incompatible implicit declaration of built-in
function ‘ex...