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A route named “x” is already in the route collection. Route names must be unique. Exception with ASP
...this problem I had to go into the bin folder on my project, delete all DLL files and then rebuild and this fixed the problem.
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What are the rules about using an underscore in a C++ identifier?
...and identifiers which are always reserved either for any use or for use as file scope identifiers.
All identifiers that begin with an underscore and either an uppercase letter or another
underscore are always reserved for any use.
All identifiers that begin with an underscore are always ...
What is the difference between exit and return? [duplicate]
...d, hence it wouldn't make much difference: allocated memory will be freed, file ressource closed and so on. But it may matter if your destructor performs IOs. For instance automatic C++ OStream locally created won't be flushed on a call to exit and you may lose some unflushed data (on the other hand...
Rails migration for change column
... needed to change the type of a column:
Step 1:
Generate a new migration file using this code:
rails g migration sample_name_change_column_type
Step 2:
Go to /db/migrate folder and edit the migration file you made. There are two different solutions.
def change
change_column(:table_name,...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...据比如文本文件、数据库和电子表格等连接起来。
1．@file函数
该函数用从外部文件中输入数据，可以放在模型中任何地方。该函数的语法格式为@file(’filename’)。这里filename是文件名，可以采用相对路径和绝对路径两...
Convert Python dictionary to JSON array
...�"}
>>> json.loads(json1)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/json/__init__.py", line 328, in loads
return _default_decoder.decode(s)
File "/usr/lib/python2.7/json/decoder.py", line 365, in decode
obj, e...
Pass entire form as data in jQuery Ajax function
...ou want to send a form with post method. For example if you want to pass a file via ajax its not gonna work.
Suppose that we have a form with this id : "myform".
the better solution is to make a FormData and send it:
var myform = document.getElementById("myform");
var fd = new FormData(my...
How to keep the spaces at the end and/or at the beginning of a String?
I have to concatenate these two strings from my resource/value files:
16 Answers
16
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Loop through an array of strings in Bash?
... is in America
Vietnam is in Asia
France is in Europe
CVS variables or files in to a list. Changing the internal field separator from a space, to what ever you want. In the example below it is changed to a comma
List="Item 1,Item 2,Item 3"
Backup_of_internal_field_separator=$IFS
IFS=,
for it...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
...mplemented purely in python and very slow, so if you need speed in reading files, it's not a good option.
If you need speed, and you need to support Python 2.6 or earlier, you can use codecs.open instead. It also has an encoding parameter, and is quite similar to io.open except it handles line-endin...