大约有 47,000 项符合查询结果（耗时：0.0840秒） [XML]
Unique combination of all elements from two (or more) vectors
...sing, which works better than the classic expand.grid function because (1) strings are not converted into factors and (2) the sorting is more intuitive:
library(tidyr)
a <- c("ABC", "DEF", "GHI")
b <- c("2012-05-01", "2012-05-02", "2012-05-03", "2012-05-04", "2012-05-05")
crossing(a, b)
# ...
Export query result to .csv file in SQL Server 2008
...QL Server > Results To Text
On the far right, there is a drop
down box called Output Format
Choose Comma Delimited and click OK
Here's a full screen version of that image, below
This will show your query results as comma-delimited text.
To save the results of a query to a file: Ctrl + Shif...
Android studio, gradle and NDK
...his out for two days until I saw your post and this solved my problem. I really think NDK build is better separately built by Android.mk command line makefile only, not by gradle script since C/C++ has been built by Makefile for more than 40 years!
– tonga
Jan ...
Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined
I have this function in my program that converts integers to strings:
2 Answers
2
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invalid target release: 1.7
...
On a Mac, where jdk6 and jdk7 are installed, this can be forced in ~/.profile: export JAVA_HOME=$(/usr/libexec/java_home -v 1.7)
– Hank
Feb 10 '14 at 20:31
...
How do you serve a file for download with AngularJS or Javascript?
...|ftp|mailto|tel|file|blob):/);
}]);
Please note that
Each time you call createObjectURL(), a new object URL is created, even if you've already created one for the same object. Each of these must be released by calling URL.revokeObjectURL() when you no longer need them. Browsers will release t...
What are all the possible values for HTTP “Content-Type” header?
...attribute "=" value
attribute := token
value := token / quoted-string
token := 1*
tspecials := "(" / ")" / "<" / ">" / "@" ; Must be in
/ "," / ";" / ":" / "\" / <"> ; quoted-string,
/ "/" / "[" / "]" / "?" / "." ; to use within
...
How to write to an existing excel file without overwriting data (using pandas)?
I use pandas to write to excel file in the following fashion:
11 Answers
11
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Clear the entire history stack and start a new activity on Android
...mple:
<activity android:name=".activities.A"
android:label="@string/A_title"
android:launchMode="singleTask"/>
<activity android:name=".activities.B"
android:label="@string/B_title"
android:launchMode="singleTask"/>
Extend Application which will...
How do I turn a python datetime into a string, with readable format date?
How do I turn that into a string?:
7 Answers
7
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