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How to write trycatch in R
I want to write trycatch code to deal with error in downloading from the web.
5 Answers
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Read the package name of an Android APK
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Is there a way to call this from within Android code? I want to be able to launch a package of an apk I download through my app.
– Matt Wear
Jun 19 '12 at 15:59
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Xcode iOS 8 Keyboard types not supported
... I am also getting this on an iPhone 6 with the latest Xcode from the App Store.
– Daniel Wood
Sep 25 '14 at 15:28
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Change private static final field using Java reflection
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Assuming no SecurityManager is preventing you from doing this, you can use setAccessible to get around private and resetting the modifier to get rid of final, and actually modify a private static final field.
Here's an example:
import java.lang.reflect.*;
public class E...
How to include file in a bash shell script
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$ LANG=C help source
source: source filename [arguments]
Execute commands from a file in the current shell.
Read and execute commands from FILENAME in the current shell. The
entries in $PATH are used to find the directory containing FILENAME.
If any ARGUMENTS are supplied, they become the positio...
What is an unsigned char?
In C/C++, what an unsigned char is used for? How is it different from a regular char ?
17 Answers
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Python Linked List
...ail. This is very useful for dynamic algorithms that require saved values from previous iterations where sharing list tails can reduce memory complexity from quadratic to linear and eliminate time overhead due to copying.
– saolof
Jun 25 '17 at 12:08
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is there a require for json in node.js
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var someObject = require('./somefile.json')
In ES6:
import someObject from ('./somefile.json')
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How to increase the gap between text and underlining in CSS
...s that even with padding-bottom: 0, the underline tends to be too far away from the text to look good. So we still don't have complete control.
One solution that gives you pixel accuracy is to use the :after pseudo element:
a {
text-decoration: none;
position: relative;
}
a:after {
con...
Why can't I call read() twice on an open file?
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With Python3, use pathlib. from pathlib import Path; text = Path(filename).read_text() Takes care of open, close, etc.
– PaulMcG
Jun 19 '17 at 12:06
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