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How to check if a python module exists without importing it
...active help system starts on the interpreter console. If the argument is a string, then the string is looked up as the name of a module, function, class, method, keyword, or documentation topic, and a help page is printed on the console. If the argument is any other kind of object, a help page on th...
How can I match a string with a regex in Bash?
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if [[ $STR == *pattern* ]]
then
echo "It is the string!"
else
echo "It's not him!"
fi
Works for me! GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu)
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Get content uri from file path in android
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Or with:
ImageView.setImageURI(Uri.parse(new File("/sdcard/cats.jpg").toString()));
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How to parse the AndroidManifest.xml file inside an .apk package
...// 0th word is 03 00 08 00
// 3rd word SEEMS TO BE: Offset at then of StringTable
// 4th word is: Number of strings in string table
// WARNING: Sometime I indiscriminently display or refer to word in
// little endian storage format, or in integer format (ie MSB first).
int numbStrings = LE...
Finding Variable Type in JavaScript
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Use typeof:
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
So you can do:
if(typeof bar === 'number') {
//whatever
}
Be careful though if you define these primitives with their object wrappers (which you should never ...
Writing string to a file on a new line every time
I want to append a newline to my string every time I call file.write() . What's the easiest way to do this in Python?
10 A...
Call ASP.NET function from JavaScript?
... Tab-Tab) this function to your code file:
public void RaisePostBackEvent(string eventArgument) { }
iii. In your onclick event in JavaScript, write the following code:
var pageId = '<%= Page.ClientID %>';
__doPostBack(pageId, argumentString);
This will call the 'RaisePostBackEvent' meth...
Using Regular Expressions to Extract a Value in Java
I have several strings in the rough form:
13 Answers
13
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How can I create a copy of an object in Python?
...ame object:
>>> tuple_copy_attempt is a_tuple
True
Similarly for strings:
>>> s = 'abc'
>>> s0 = s[:]
>>> s == s0
True
>>> s is s0
True
and for frozensets, even though they have a copy method:
>>> a_frozenset = frozenset('abc')
>>> fro...
What is “2's Complement”?
...hree
1100 to 1000 - negative four to negative eight
Note that you get one extra value for negatives (1000 = -8) that you don't for positives. This is because 0000 is used for zero. This can be considered as Number Line of computers.
Distinguishing between positive and negative numbers
Doing this, t...