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Smallest data URI image possible for a transparent image
...g prevent CSS backgrounds (in some browsers).
Shorter (but unstable - 74 bytes)
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
I would advise using the slightly longer and more stable version as follows:
⇊ Stable ⇊ (but slightly longer - 78 bytes)
data:image/gi...
'is' versus try cast with null check
...ersion is not thread-safe. The value of myObj or myProp could get changed (by another thread) between the is and the cast, causing undesirable behaviour.
– Jeff
Nov 15 '12 at 21:16
...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...N SLAVE ON *.*
TO '<SLAVE_USER>'@'<SLAVE_HOST>'
IDENTIFIED BY '<SLAVE_PASSWORD>';
注：出于安全性和灵活性的考虑，不要把root等具有SUPER权限用户作为复制账号。
然后设置主服务器配置文件（缺省：/etc/my.cnf）：
[mysqld]
server_id = 1...
How do I pass a method as a parameter in Python
...
I'm confused by your apparent conflation of the word method with function. def method1(spam): is a function definition, not a method definition.
– Michael Dorst
Aug 24 at 23:54
...
How to do Base64 encoding in node.js?
...od is very
fast, and will strip the high bit if set.
'utf8' - Multi byte encoded
Unicode characters. Many web pages and other document formats use
UTF-8.
'ucs2' - 2-bytes, little endian encoded Unicode characters. It
can encode only BMP(Basic Multilingual Plane, U+0000 - U+FFFF).
...
What's the “average” requests per second for a production web application?
... neccessarily relate.
Your average # of requests per second is determined by
a. the number of simultaneous users
b. the average number of page requests they make per second
c. the number of additional requests (i.e. ajax calls, etc)
As to what is considered fast.. do you mean how few reque...
variable === undefined vs. typeof variable === “undefined”
...erable]]: false, [[Configurable]]: false }.
But it still can be shadowed by a local variable:
(function() {
var undefined = "foo";
var variable = "foo";
if (variable === undefined)
console.log("eh, what?!");
})()
or parameter:
(function(undefined) {
var variable = "foo";
if (va...
The model used to open the store is incompatible with the one used to create the store
...e solve a problem in Xcode 4.6, where I sent to trash all my projects file by mistake :/
– ramirogm
Mar 6 '13 at 20:55
6
...
How do I remove a property from a JavaScript object?
...index to stop at. If end is negative it, it specifies the index to stop at by counting back from the end of the array (eg. -1 will omit the final index). If end <= start, the result is an empty array.
let a = [0,1,2,3,4]
let slices = [
a.slice(0,2),
a.slice(2,2),
a.slice(2,3),
a....
Where to put the doxygen comment blocks for an internal library - in H or in CPP files? [closed]
...had a painful reminder of why docs in headers should be avoided - was told by a senior VP to put method comments in the class declaration and found myself actually saving up comment edits for later because hitting those headers triggers a 45 minute build time!
– Andy Dent
...