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How to remove last n characters from every element in the R vector
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@LucasSeveryn If you want to convert character time representations to dates taking into account time zones, please edit that into your question. Likely there are better answers that will get you directly to your desired results (such as strptime).
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Random string generation with upper case letters and digits
...random string of length string_length."""
random = str(uuid.uuid4()) # Convert UUID format to a Python string.
random = random.upper() # Make all characters uppercase.
random = random.replace("-","") # Remove the UUID '-'.
return random[0:string_length] # Return the random string.
p...
Concatenate two string literals
..., for the null terminator). When you use an array in most contexts, it is converted into a pointer to its initial element.
So, when you try to do "Hello" + ",world", what you're really trying to do is add two const char*s together, which isn't possible (what would it mean to add two pointers tog...
When is JavaScript's eval() not evil?
... (for spreadsheet-like functionality). Having parsed the formula I could convert it into JavaScript and run eval() on it to yield the result.
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How to remove all callbacks from a Handler?
I have a Handler from my sub-Activity that was called by the main Activity . This Handler is used by sub-classes to postDelay some Runnables, and I can't manage them. Now, in the onStop event, I need to remove them before finishing the Activity (somehow I called finish() , but it still call ...
Assign multiple columns using := in data.table, by group
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@dnlbrky dim returns a vector so converting that to type list should rotate it; e.g. [,c("rows","cols"):=as.list(dim(get(objectName))),by=objectName]. Trouble is that as.list has call overhead and also copies the small vector. If efficiency is a proble...
Cannot change column used in a foreign key constraint
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The type and definition of foreign key field and reference must be equal.
This means your foreign key disallows changing the type of your field.
One solution would be this:
LOCK TABLES
favorite_food WRITE,
person WRITE;
AL...
How to pretty-print a numpy.array without scientific notation and with given precision?
...printoptions to set the precision of the output:
import numpy as np
x=np.random.random(10)
print(x)
# [ 0.07837821 0.48002108 0.41274116 0.82993414 0.77610352 0.1023732
# 0.51303098 0.4617183 0.33487207 0.71162095]
np.set_printoptions(precision=3)
print(x)
# [ 0.078 0.48 0.413 0.83 ...
error: Unable to find vcvarsall.bat
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You can also wheel convert ....exe these installers and then install them with pip whenever you like.
– Zooba
Sep 29 '14 at 22:27
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Ember.js or Backbone.js for Restful backend [closed]
...e patterns, and complex state management. I went through the experience of converting a legacy app over to Backbone and had to do exactly what you listed. We needed to integrate Marionette as well as write plenty of glue code for things like pre/post route filtering, memory leak mitigation, and bett...