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Objective-C ARC: strong vs retain and weak vs assign
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Below is the detailed article link where you can find above mentioned all attributes, that will definitely help you.
Many thanks to all the people who give best answers here!!
Variable property attributes or Modifiers in iOS
1.strong (iOS4 = retain )
it says "keep this in the heap ...
Difference between OData and REST web services
...'JSON Light' which addresses both of these concerns (which are really just one), i.e. $metadata is how you know to build queries, so all that was missing is a link to $metadata in resource representations. That has been added, so both problems disappear in one go.
– Alex James
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How can I create directories recursively? [duplicate]
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I would say this answer is the correct one for Python 2.x, since it handles errors correctly and doesn't asks for file system for path twice (as with os.path.exists approach).
– wonder.mice
Mar 19 '18 at 22:22
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console.log timestamps in Chrome?
...te.now() + '] ';
this.logCopy(timestamp, data);
};
To log more than one thing and in a nice way (like object tree representation):
console.logCopy = console.log.bind(console);
console.log = function()
{
if (arguments.length)
{
var timestamp = '[' + Date.now() + '] ';
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How can I import Swift code to Objective-C?
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@lelelo No, that file is the opposite of this one. The bridging header is written by the developer and lets you bring Objective-C and C symbols into your Swift code. The Target-Swift.h file is automatically generated and lets your Objective-C/C code access Swift symbols....
Prepend a level to a pandas MultiIndex
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A nice way to do this in one line using pandas.concat():
import pandas as pd
pd.concat([df], keys=['Foo'], names=['Firstlevel'])
An even shorter way:
pd.concat({'Foo': df}, names=['Firstlevel'])
This can be generalized to many data frames, see the...
How can I remove a commit on GitHub? [duplicate]
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Everyone beware. See subutux's comment below. Even after force pushing to GitHub, GH still caches your commit. From help.github.com/articles/remove-sensitive-data : "Danger: Once the commit has been pushed you should consider the ...
Run two async tasks in parallel and collect results in .NET 4.5
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I didn't get the results from either one of the tasks. So I changed it to Task<TResult> t1 = LongTask1(); and now I get t1.Result. <TResult> is the returning type of your result. You'll need a return <TResult> in your method for this to work.
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Calculating Pearson correlation and significance in Python
...ataset be normally distributed. Like other correlation
coefficients, this one varies between -1 and +1 with 0 implying no
correlation. Correlations of -1 or +1 imply an exact linear
relationship. Positive correlations imply that as x increases, so does
y. Negative correlations imply that as x in...
npm command to uninstall or prune unused packages in Node.js
...ply uninstall all unused (undeclared) dependencies from a Node.js project (ones that are no longer defined in my package.json .) When I update my application I like to have the unreferenced packages removed automatically.
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