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Format number as fixed width, with leading zeros [duplicate]
...teger of width 3:
a <- seq(1,101,25)
sprintf("name_%03d", a)
[1] "name_001" "name_026" "name_051" "name_076" "name_101"
Another is formatC and paste:
paste("name", formatC(a, width=3, flag="0"), sep="_")
[1] "name_001" "name_026" "name_051" "name_076" "name_101"
...
阿里云物联网平台开通及基础用法 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...中会被替换成对应的名字，例如你在该产品下创建了个 D001 设备，那么该设备的topic就是：
/你自己的Product/D001/user/test
在添加产品和创建设备完成后，可以在设备的详情页中获得MQTT协议所需的三元组，点击MQTT连接参数后的...
How to round a number to n decimal places in Java
...make it so that it does a proper rounding so it will not round 0.0004 to 0.001
– user4919188
Oct 20 '16 at 8:00
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Why use double indirection? or Why use pointers to pointers?
...3
pmgpmg
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jQuery if checkbox is checked
... answered Dec 20 '16 at 20:53
DA001DA001
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NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream
...stCGI
2017/09/27 13:34:03 [error] 16559#16559: *14381 upstream timed out (110: Connection timed out) while reading response header from upstream, client:xxxxxxxxxxxxxxxxxxxxxxxxx", upstream: "fastcgi://unix:/var/run/php/php5.6-fpm.sock", host: "xxxxxxxxxxxxxxx", referrer: "xxxxxxxxxxxxxxxxxxxx"
S...
What's the best way to parse a JSON response from the requests library?
... each of the elements would still be unicode.
– felix001
Jun 1 '13 at 21:43
@felix001: yes, although you can convert a...
Is < faster than
...
Jonathon ReinhartJonathon Reinhart
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How can I request the vibrate permission?
... creative pattern try the star wars theme =D
v.vibrate(new long[]{0, 500, 110, 500, 110, 450, 110, 200, 110, 170, 40, 450, 110, 200, 110, 170, 40, 500}, -1);
share
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|...
Check if a value is within a range of numbers
... You don't need "multiple if" statements to do it, either:
if (x >= 0.001 && x <= 0.009) {
// something
}
You could write yourself a "between()" function:
function between(x, min, max) {
return x >= min && x <= max;
}
// ...
if (between(x, 0.001, 0.009)) {
// s...