大约有 190 项符合查询结果（耗时：0.0060秒） [XML]
Java 8 forEach with index [duplicate]
...ava and its terrible syntax for simple things.
– AFP_555
Nov 4 '17 at 6:38
1
When will java offer...
Check if a String contains numbers Java
...t "123abc", the method above will return 123.
For "abc1000def", 1000.
For "555abc45", 555.
For "abc", will return an empty string.
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Using scp to copy a file to Amazon EC2 instance?
...e:
scp -i /path/to/whatever.pem /users/me/path-to-file ec2-user@ec2-55-55-555-555.compute-1.amazonaws.com:~
Few notes for beginning:
Note the spaces between the three parameters given after the -i
scp stands for secure copy protocol. Knowing the words makes it easier to remember the command.
-i...
When to Redis? When to MongoDB? [closed]
...{
_id: 0x194f38dc491a,
Name: "John Smith",
PhoneNumber:
Home: "555 999-1234",
Work: "555 999-9876",
Mobile: "555 634-5789"
Accounts:
- "379-1111"
- "379-2574"
- "414-6731"
}
The above document has a key, PhoneNumber.Mobile, which has value 555 634-5789. You can s...
Safely turning a JSON string into an object
...se()":
var jsontext = '{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsontext);
and reversing it:
var str = JSON.stringify(arr);
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Get a UTC timestamp [duplicate]
...(), now.getUTCMilliseconds());
Live demo here http://jsfiddle.net/naryad/uU7FH/1/
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How to select rows from a DataFrame based on column values?
...1.038989 1.219233 1.037020 1.000000
query 4.997304 4.765554 5.934096 4.500559 2.997924 2.397013 1.680447 1.398190
xs_label 4.124597 4.272363 5.596152 4.295331 4.676591 5.710680 6.032809 8.950255
mask_with_isin 1.674055 1.679935 1.847972 1.72418...
Excel Date to String conversion
...ats which means that for example "DD/MM/YYYY hh:mm:ss" becomes "DD/MM/JJJJ uu:mm:ss" because in Dutch, 'year' is 'jaar' and 'hour' is 'uur' i.e. other starting letters (while 'day', 'month', 'minutes' and 'seconds' start with the same letters in both Dutch and English). Basically, translate the star...
How to use mongoimport to import csv
...ddress,City,State,ZIP
Jane Doe,123 Main St,Whereverville,CA,90210
John Doe,555 Broadway Ave,New York,NY,10010
ctrl-d
$ mongoimport -d mydb -c things --type csv --file locations.csv --headerline
connected to: 127.0.0.1
imported 3 objects
$ mongo
MongoDB shell version: 1.7.3
connecting to: test
> ...
How to add texture to fill colors in ggplot2
...s dictate height of horizontal line. Outer: vertical edge lines.
x6 = c(.555,.555,.88,.88), # 1st 2 values dictate starting point of line. 2nd 2 dictate width. Each whole = one background grid
y6 = c(6,6,20,20),# inner 2 values dictate height of horizontal line. Outer: vertical edge lines.
x7 ...