大约有 45,000 项符合查询结果（耗时：0.0472秒） [XML]
MongoDB not equal to
...8b1a7768972d396fe2268"), "author" : "you", "post" : "how to query" }
And now $not, which takes in predicate ($ne) and negates it ($not):
db.test.find({'post': {$not: {$ne : ""}}})
{ "_id" : ObjectId("4f68b19c768972d396fe2267"), "author" : "me", "post" : "" }
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Compare two DataFrames and output their differences side-by-side
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df_final = df_all.swaplevel(axis='columns')[df.columns[1:]]
df_final
Now, its much easier to spot the differences in the frames. But, we can go further and use the style property to highlight the cells that are different. We define a custom function to do this which you can see in this part of...
Why is __dirname not defined in node REPL?
... Also you can't use some of the Global variables inside RequireJS modules. If you use RequireJS on the server side, see stackoverflow.com/questions/9027429/….
– Eye
Nov 5 '12 at 8:25
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How do I expand the output display to see more columns of a pandas DataFrame?
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Nowadays options can also be set as assignments to attributes of pd.options, e.g. pd.options.display.max_rows = 999
– unutbu
Jun 7 '15 at 0:19
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ERROR 1130 (HY000): Host '' is not allowed to connect to this MySQL server [duplicate]
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and now it just complains that Access denied for user
– user3338098
Nov 4 '15 at 17:34
5
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$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
Some guy called one of my Snipplr submissions "crap" because I used if ($_SERVER['REQUEST_METHOD'] == 'POST') instead of if ($_POST)
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C Macro definition to determine big endian or little endian machine?
...ing arbitrary byte orders, ready to be put into a file called order32.h:
#ifndef ORDER32_H
#define ORDER32_H
#include <limits.h>
#include <stdint.h>
#if CHAR_BIT != 8
#error "unsupported char size"
#endif
enum
{
O32_LITTLE_ENDIAN = 0x03020100ul,
O32_BIG_ENDIAN = 0x00010203ul,...
Safe characters for friendly url [closed]
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@Dietrich Epp, thank you. I guess it shouldn't matter if the URL is for decoration and SEO purposes, like: www.mysite.com/[postId]/post-title-with-ç-and-õ
– Mohamad
Jun 19 '11 at 15:22
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Node.js project naming conventions for files & folders
...ion not for directory structures. When we get to this topic, we expect to know if files are better named with dashes, underscores or camelCase. I will upvote, if this is added to this answer.
– Tronix117
Aug 4 '14 at 14:51
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MIN and MAX in C
Where are MIN and MAX defined in C, if at all?
14 Answers
14
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