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MongoDB relationships: embed or reference?
...?
You can query by sub-document: db.question.find({'comments.content' : 'xxx'}).
This will return the whole Question document. To edit the specified comment, you then have to find the comment on the client, make the edit and save that back to the DB.
In general, if your document contains an arra...
Setting up foreign keys in phpMyAdmin?
... tab in phpMyAdmin) for this to not happen.
– muttley91
Oct 16 '14 at 2:44
4
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How to reset or change the MySQL root password?
...nd even the instructions on MySQL's help page.
– mbuc91
May 11 '17 at 5:15
9
I had to run UPDATE...
jQuery change input text value
...
Best practice is using the identify directly:
$('#id').val('xxx');
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How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
... $f=0x80; // 10000000
$str = "";
// U-00000000 - U-0000007F: 0xxxxxxx
if($unicode_c_val <= 0x7F){ $str = chr($unicode_c_val); } //U-00000080 - U-000007FF: 110xxxxx 10xxxxxx
else if($unicode_c_val >= 0x80 && $unicode_c_val <= 0x7FF){ $h=0...
使用 XML 和 Web 服务 · App Inventor 2 中文网
...们 关注我，不迷路 在线 客服 扫码添加客服咨询 我要 分享 扫码分享到朋友圈 顶部 var qrcode = new QRCode("qrcode", { ...
How to create a self-signed certificate with OpenSSL
...n:
openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days XXX
req
PKCS#10 certificate request and certificate generating utility.
-x509
this option outputs a self signed certificate instead of a certificate request.
This is typically used to generate a test certifi...
Compile time string hashing
...x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
...
};
template<size_t idx>
constexpr uint32_t crc32(const char * str)
{
return (crc32<idx-1>(str) >> 8) ^ crc_table[(crc32<idx-1>(str) ^ s...
How to print colored text in Python?
...33[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
To use code like this, you can do something like
print(bcolors.WARNING + "Warning: No active frommets remain. Continue?" + bcolors.ENDC)
or, with ...
String.equals versus == [duplicate]
...e likes are interned to comply with the spec, it's not mere optimization. "xxx" is always == "xxx", this is part of the language design not an impl. detail/guideline.
– bestsss
Jun 7 '12 at 12:52
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