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php中json_decode()和json_encode()的使用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Example #1 json_decode() 的例子
<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>
上例将输出：
object(stdClass)#1 (5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => i...
Equivalent of varchar(max) in MySQL?
...the max row size in MySQL, which is 64KB (not counting BLOBs):
VARCHAR(65535)
However, note that the limit is lower if you use a multi-byte character set:
VARCHAR(21844) CHARACTER SET utf8
Here are some examples:
The maximum row size is 65535, but a varchar also includes a byte or two to en...
switch() statement usage
...e) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 secs
system.time( for(i in 1:1e6) test2('mean') ) #...
Browser support for URLs beginning with double slash
... |
edited Feb 26 '19 at 1:35
user3261338
answered Mar 9 '12 at 10:18
...
How can I assign the output of a function to a variable using bash?
...
3 Answers
3
Active
...
Pry: show me the stack
...on <AbstractController::Base#process_action(method_name, *args)>
#3 [method] process_action <ActionController::Rendering#process_action(*arg1)>
<... clipped ...>
[2] pry(#<PostsController>)> up
Frame number: 1/64
Frame type: method
From: /Users/johnmair/.rvm/gems/ru...
Find and copy files
...
Sergey Brunov
11.4k77 gold badges3535 silver badges6969 bronze badges
answered Mar 9 '11 at 5:19
malcolmpdxmalcolmpdx
...
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...
answered Feb 3 '10 at 16:20
Eric LippertEric Lippert
599k164164 gold badges11551155 silver badges20142014 bronze badges
...
sqlalchemy: how to join several tables by one query?
...
Ryabchenko Alexander
3,22711 gold badge1919 silver badges4545 bronze badges
answered May 18 '11 at 13:04
Abdul KaderAbdul ...