大约有 30,000 项符合查询结果（耗时：0.0314秒） [XML]
Difference between Docu<em>mem>ent-based and Key/Value-based databases?
...
The <em>mem>ain differences are the data <em>mem>odel and the querying capabilities.
Key-value stores
The first type is very si<em>mem>ple and probably doesn't need any further explanation.
Data <em>mem>odel: <em>mem>ore than key-value stores
Although there is...
What does Ht<em>mem>l.HiddenFor do?
Although I have read the docu<em>mem>entation on Ht<em>mem>l.HiddenFor, I've not grasped what is it used for...
4 Answers
...
Xcode 4 and Core Data: How to enable SQL Debugging
I'<em>mem> working on a universal iOS app and I'd like to see the raw SQL in the logs when I'<em>mem> debugging. There is so<em>mem>e info in this blog post about how to enable raw SQL logging for iOS Core Data develop<em>mem>ent. The given exa<em>mem>ple is for Xcode 3 and it's just not clear to <em>mem>e how to enable this in Xcode 4.
...
In Eclipse, can I have <em>mem>ultiple Console views at once, each showing a different Console?
I'<em>mem> working on so<em>mem>e applications that, in debug <em>mem>ode, log to the console. I'd like to run and debug the<em>mem> fro<em>mem> inside of Eclipse, and view the console for each one si<em>mem>ultaneously. However, I have a single Console tab that shows a single Console output at a ti<em>mem>e. Is there a way I can split the console...
How to write a JSON file in C#?
I need to write the following data into a text file using JSON for<em>mem>at in C#. The brackets are i<em>mem>portant for it to be valid JSON for<em>mem>at.
...
Search for “does-not-contain” on a DataFra<em>mem>e in pandas
I've done so<em>mem>e searching and can't figure out how to filter a datafra<em>mem>e by df["col"].str.contains(word) , however I'<em>mem> wondering if there is a way to do the reverse: filter a datafra<em>mem>e by that set's co<em>mem>pli<em>mem>ent. eg: to the effect of !(df["col"].str.contains(word)) .
...
How to convert a boolean array to an int array
...
Nu<em>mem>py arrays have an astype <em>mem>ethod. Just do y.astype(int).
Note that it <em>mem>ight not even be necessary to do this, depending on what you're using the array for. Bool will be autopro<em>mem>oted to int in <em>mem>any cases, so you can add it ...
What does 'wb' <em>mem>ean in this code, using Python?
...
File <em>mem>ode, write and binary. Since you are writing a .jpg file, it looks fine.
But if you supposed to read that jpg file you need to use 'rb'
<em>Mem>ore info
On Windows, 'b' appended to the <em>mem>ode
opens the file in binary <em>mem>ode, s...
Superiority of unna<em>mem>ed na<em>mem>espace over static?
How are unna<em>mem>ed na<em>mem>espaces superior to the static keyword?
2 Answers
2
...
error: writable ato<em>mem>ic property cannot pair a synthesized setter/getter with a user defined setter/g
I recently tried to co<em>mem>pile an older Xcode project (which used to co<em>mem>pile just fine), and now I'<em>mem> seeing a lot of errors of this for<em>mem>:
...