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How to check if PHP array is associative or sequential?
...w to determine whether an array has sequential numeric keys, starting from 0
Consider which of these behaviours you actually need. (It may be that either will do for your purposes.)
The first question (simply checking that all keys are numeric) is answered well by Captain kurO.
For the second qu...
Reference list item by index within Django template?
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190
It looks like {{ data.0 }}. See Variables and lookups.
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Bash tool to get nth line from a file
...re NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Explanation:
NUMq will quit immediately when the line number is NUM.
d will delete the line instead of printing it; this is inhibited on the last line because the q causes the res...
The order of keys in dictionaries
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80
You could use OrderedDict (requires Python 2.7) or higher.
Also, note that OrderedDict({'a': 1,...
mysql :: insert into table, data from another table?
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406
INSERT INTO action_2_members (campaign_id, mobile, vote, vote_date)
SELECT campaign_id, from_...
(![]+[])[+[]]… Explain why this works
..., for example.
![]; // false, it was truthy
!{}; // false, it was truthy
!0; // true, it was falsey
!NaN; // true, it was falsey
After it, we have the second operand of the addition, an empty Array, [], this is made just to convert the false value to String, because the string representation of...
Moving UITabBarItem Image down?
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180
Try adjusting tabBarItem's imageInsets (for moving the icon image) and setting the controllers t...
Ruby: Merging variables in to a string
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answered Feb 16 '09 at 21:42
Mike WoodhouseMike Woodhouse
47.6k1212 gold badges8585 silver badges123123 bronze badges
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防挂马：apache禁止访问文件或目录执行权限、禁止运行脚本PHP文件的设置方...
...权限的目录路径，例如：D:/piaoyun.cc/upload">
ErrorDocument 404 /404/404.html
ErrorDocument 403 /404/403.html
<FilesMatch "\.(?i:php|php3|php4)$"> // ?是尽可能多的匹配.php的字符串,i是不区分大小写,然后冒号后面跟上正则表达式，也可以写成：<FilesMat...
Preventing scroll bars from being hidden for MacOS trackpad users in WebKit/Blink
WebKit/Blink's (Safari/Chrome) default behaviour on MacOS since 10.7 (Mac OS X Lion) is to hide scroll bars from trackpad users when they're not in use. This can be confusing ; the scroll bar is often the only visual cue that an element is scrollable.
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