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How to get first character of string?
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edited Jan 13 '16 at 12:25
Clemens Himmer
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python: how to identify if a variable is an array or a scalar
...[0, 10, 20, 30], list)
True
>>> isinstance(50, list)
False
To support any type of sequence, check collections.Sequence instead of list.
note: isinstance also supports a tuple of classes, check type(x) in (..., ...) should be avoided and is unnecessary.
You may also wanna check not isins...
Query-string encoding of a Javascript Object
Do you know a fast and simple way to encode a Javascript Object into a string that I can pass via a GET Request?
40 Ans...
How to use Bash to create a folder if it doesn't already exist?
This doesn't seem to work. Can anyone help?
6 Answers
6
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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结1.auto_ptr 被复制后，将失去原来所致资源的所有权；2.scoped_ptr永远不能被复制或被赋值！scoped_ptr拥有它所指向的资源的所有权，并永远不会放弃这个所有权；3.shared_ptr 是可以共享所有权的...
How can I get a list of build targets in Ant?
My codebase has a long build.properties file written by someone else. I want to see the available built targets without having to search through the file manually. Does ant have a command for this - something like ant show-targets - that will make it list all the targets in the build file?
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How do I give text or an image a transparent background using CSS?
Is it possible, using CSS only, to make the background of an element semi-transparent but have the content (text & images) of the element opaque?
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How do I grep for all non-ASCII characters?
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You can use the command:
grep --color='auto' -P -n "[\x80-\xFF]" file.xml
This will give you the line number, and will highlight non-ascii chars in red.
In some systems, depending on your settings, the above will not work, so you can grep by the inv...
Retrieve database or any other file from the Internal Storage using run-as
...the data folder containing the database using the run-as command with my package name. Most files types I am content with just viewing, but with the database I would like to pull if from the android device.
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C++ Returning reference to local variable
...orrect if it has to return i? I remember reading somewhere that there is a problem when returning reference to a local variable. How is it different from func2()?
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