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Linux command (like cat) to read a specified quantity of characters
Is there a command like cat in linux which can return a specified quantity of characters from a file?
9 Answers
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Iterate over object attributes in python
... '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'bar', 'foo', 'func']
You can always filter out the special methods by using a list comprehension.
>>> [a for a in dir(o...
Bash if [ false ] ; returns true
...s if the command you give it succeeds or fails. The test command takes an expression and succeeds if the expression is true; a non-empty string is an expression that evaluates as true, just as in most other programming languages. false is a command which always fails. (By analogy, true is a command ...
bash: shortest way to get n-th column of output
...wing form of columnized output from some command in bash (in my case from executing svn st in my Rails working directory):
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How to create EditText with cross(x) button at end of it?
Is there any widget like EditText which contains a cross button, or is there any property for EditText by which it is created automatically? I want the cross button to delete whatever text written in EditText .
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Check if two unordered lists are equal [duplicate]
... If you convert both lists to sets, the comparison will be unordered.
set(x) == set(y)
Documentation on set
EDIT: @mdwhatcott points out that you want to check for duplicates. set ignores these, so you need a similar data structure that also keeps track of the number of items in each list. Thi...
How do I print the full value of a long string in gdb?
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You may also need to "set max-value-size unlimited".
– ams
Oct 30 '18 at 20:22
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Is there an equivalent of lsusb for OS X
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I got tired of forgetting the system_profiler SPUSBDataType syntax, so I made an lsusb alternative. You can find it here , or install it with homebrew:
brew install lsusb
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How to find all positions of the maximum value in a list?
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>>> m = max(a)
>>> [i for i, j in enumerate(a) if j == m]
[9, 12]
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Checking if a string array contains a value, and if so, getting its position
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You could use the Array.IndexOf method:
string[] stringArray = { "text1", "text2", "text3", "text4" };
string value = "text3";
int pos = Array.IndexOf(stringArray, value);
if (pos > -1)
{
// the array contains the string and the pos variable
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