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How to check if std::map contains a key without doing insert?
...'s when coders succumb to the trap of paying costs in readability/dev time/etc, all for unmeasured "performance gains" that the premature optimization rhetoric becomes the right advice to give.
– VoidStar
Feb 24 '14 at 10:52
...
Remove non-numeric characters (except periods and commas) from a string
...tters from the string. Other characters, such as spaces, brackets, quotes, etc. are kept inside the result. --> Only use this solution, if you know that your input string only contains letters and numbers, and no other characters!
– Philipp
Sep 14 '18 at 12:...
ruby 1.9: invalid byte sequence in UTF-8
...nless String.method_defined?(:encode)
if String.method_defined?(:encode)
file_contents.encode!('UTF-8', 'UTF-8', :invalid => :replace)
else
ic = Iconv.new('UTF-8', 'UTF-8//IGNORE')
file_contents = ic.iconv(file_contents)
end
or if you have really troublesome input you can do a double conv...
How can I extract the folder path from file path in Python?
I would like to get just the folder path from the full path to a file.
6 Answers
6
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How can I detect if the user is on localhost in PHP?
... machine it is executed on.
In my opinion, the easiest way is to create a file called DEVMACHINE or whatever you want really and then simply check
file_exists('DEVMACHINE')
Remember to exclude this file when uploading to the live hosting environment!
This solution is not depending on network...
Parsing a JSON string in Ruby
..."desc"]["someKey"]
p parsed["main_item"]["stats"]["a"]
# Read JSON from a file, iterate over objects
file = open("shops.json")
json = file.read
parsed = JSON.parse(json)
parsed["shop"].each do |shop|
p shop["id"]
end
s...
C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
...命周期”机制替他记住了 :O) ] 下面是一个例子：
class File_handle {
FILE* p;
public:
File_handle(const char* n, const char* a)
{ p = fopen(n,a); if (p==0) throw Open_error(errno); }
File_handle(FILE* pp)
{ p = pp; if (p==0...
Timer & TimerTask versus Thread + sleep in Java
...And it deals better with multithreading issues (such as avoiding deadlocks etc.). And of course it is usually better to use well-tested standard code instead of some homemade solution.
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impro...
Are Swift variables atomic?
...n't seem to have any information about concurrency yet! (It also lacks KVO etc ...)
I think the answer to this question will become clear in future releases.
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Purging file from Git repo failed, unable to create new backup
I tried to remove a file from my remote repo by running:
4 Answers
4
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