大约有 30,000 项符合查询结果（耗时：0.0340秒） [XML]
Android: install .apk programmatically [duplicate]
...file = new File(destination);
if (file.exists())
//file.delete() - test this, I think sometimes it doesnt work
file.delete();
//get url of app on server
String url = Main.this.getString(R.string.update_app_url);
//set downloadmanager
DownloadManager.Request request ...
SQL WHERE.. IN clause multiple columns
... @sleske: EXISTS is by far better: see my comments in my answer. And test it first,. @mrdenny: I misread your answer at first, I'd use EXISTS too
– gbn
Jul 16 '09 at 8:17
6
...
Filter rows which contain a certain string
...str", "", object) # -> "ingr"
Benchmark
The results of the benchmark test are as follows. For large dataframe, str_detect is faster.
library(rbenchmark)
library(tidyverse)
# The data. Data expo 09. ASA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html...
CORS Access-Control-Allow-Headers wildcard being ignored?
...w-Headers does accept wildcards. It's also wrong, wildcard works for me (I tested only with Chrome)
This take me half day to figure out the issue.
Happy coding
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How to pip or easy_install tkinter on Windows
...ter these two commands:
>>> import tkinter
>>> tkinter._test()
This should pop up a small window; the first line at the top of the window should say "This is Tcl/Tk version 8.5"; make sure it is not 8.4!
2) Uninstall 64-bit Python and install 32 bit Python.
...
What is the bit size of long on 64-bit Windows?
...ly because he doesn't have convenient access to a 64-bit Windows system to test on.
– Quuxplusone
Dec 2 '13 at 23:09
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How to count total lines changed by a specific author in a Git repository?
...is a new package on github that looks slick and uses bash as dependencies (tested on linux). It's more suitable for direct usage rather than scripts.
It's git-quick-stats (github link).
Copy git-quick-stats to a folder and add the folder to path.
mkdir ~/source
cd ~/source
git clone git@github.co...
Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...be surprised by what a garden variety pow(double, double) is capable of. I tested a hundred million iterations on my 5-year-old IBM Thinkpad with x equal to the iteration number and n equal to 10. In this scenario, pown_l won. glibc pow() took 12.0 user seconds, pown took 7.4 user seconds, and pown_...
What is the native keyword in Java for?
..._HOME}/include/linux Main.c
java -Djava.library.path=. Main
Output:
4
Tested on Ubuntu 14.04 AMD64. Also worked with Oracle JDK 1.8.0_45.
Example on GitHub for you to play with.
Underscores in Java package / file names must be escaped with _1 in the C function name as mentioned at: Invoking J...
Ignoring SSL certificate in Apache HttpClient 4.3
...cketFactory.ALLOW_ALL_HOSTNAME_VERIFIER on purpose: The point was to allow testing with self signed certificates so you don't have to acquire a proper certificate from a certification authority. You can easily create a self-signed certificate with the correct host name, so do that instead of adding ...