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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...pe="text/javascript"> alert(document.documentElement.clientWidth); //弹出600，正常情况应该弹出320 </script>
<meta name="viewport" content="width=600">
<script type="text/javascript"> alert(document.documentElement.clientWidth); //弹出320，正常情况应该弹出600 </script>
测...
How do you add swap to an EC2 instance?
...o of=/var/swap.1 bs=1M count=1024
sudo /sbin/mkswap /var/swap.1
sudo chmod 600 /var/swap.1
sudo /sbin/swapon /var/swap.1
If you need more than 1024 then change that to something higher.
To enable it by default after reboot, add this line to /etc/fstab:
/var/swap.1 swap swap defaults ...
How to delay the .keyup() handler until the user stops typing?
...
Interesting that the solution with more than 600 upvotes as of the day I write this comment is not as good as this answer with only 2 upvotes (including mine). Clearly superior, because it supports multiple widgets that can either share, or not share, the delay. Excel...
Fastest way to extract frames using ffmpeg?
...
If you know exactly which frames to extract, eg 1, 200, 400, 600, 800, 1000, try using:
select='eq(n\,1)+eq(n\,200)+eq(n\,400)+eq(n\,600)+eq(n\,800)+eq(n\,1000)' \
-vsync vfr -q:v 2
I'm using this with a pipe to Imagemagick's montage to get 10 frames preview from any videos. ...
ios程序员和android程序员的笑话 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...00 320×480 360×480 360×640 480×640 480×720 480×800 480×854 540×960 600×800 600×1024 640×960 720×1280 752×1280 768×1024 800×1024 800×1280 分辨率。还有1核，2核，3核，4核，5核，6核，7核，8核。。。。的支持优化。还得要多窗口运行不死掉。。。。...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...pies at all.
Or, we can modify the original DT by reference :
DT[2, b := 600]
# a b
# [1,] 1 11
# [2,] 2 600
.Internal(inspect(DT))
# @0000000003B7E2A0 19 VECSXP g0c7 [OBJ,NAM(2),ATT] (len=2, tl=100)
# @00000000040C2288 14 REALSXP g0c2 [NAM(2)] (len=2, tl=0) 1,2
# @00000000040C2250 14...
Tablet or Phone - Android
...reen_type">phone</string>
</resources>
File res/values-sw600dp/screen.xml (assuming res/layout-sw600dp/ contains your layout files for small tablets like the Nexus 7)
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="screen_type">7-inch-tablet&l...
PHP中9大缓存技术总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...upload_max_filesize = 1000M
post_max_size = 1000M
max_execution_time = 600 ; 每个PHP页面运行的最大时间值(秒)，默认30秒
max_input_time = 600 ; 每个PHP页面接收数据所需的最大时间，默认60
memory_limit = 128M ; 每个PHP页面所吃掉的最大内存，默认8M
...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
... To reiterate, the SELECT N + 1 problem is, at its core: I have 600 records to retrieve. Is it faster to get all 600 of them in one query, or 1 at a time in 600 queries. Unless you're on MyISAM and/or you have a poorly normalized/poorly indexed schema (in which case the ORM isn't the prob...
Android Left to Right slide animation
...roid.com/apk/res/android" >
<translate
android:duration="600"
android:fromXDelta="100%"
android:toXDelta="0%" >
</translate>
</set>
anim_slide_in_right.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.andro...