大约有 32,294 项符合查询结果（耗时：0.0534秒） [XML]
When is SQLiteOpenHelper onCreate() / onUpgrade() run?
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@Jaskey The version number is for your code i.e. what schema version the code expects to run against. If the file is older (from a previous version of your app), it needs to be upgraded.
– laalto
Oct 13 '14 at 11:26
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How do I find the duplicates in a list and create another list with them?
...dd(x)]
I don't recommend the latter style, because it is not obvious what not seen.add(x) is doing (the set add() method always returns None, hence the need for not).
To compute the list of duplicated elements without libraries:
seen = {}
dupes = []
for x in a:
if x not in seen:
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How to change a git submodule to point to a subfolder?
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What you want to do is create a branch in the submodule and move the folder up and delete what you don't need. You can then manage that branch instead. If you want to push up your changes, you should be able to back merge fir...
Never seen before C++ for loop
..."u--" in two separate places, and the loop isn't really clearer (I can see what the for loop does in one glance; I have to scan with multiple lines). Being terse has benefits too. Don't downplay them. Still though, a good example of how else it could be written. It does make it easier to understand ...
How many bits or bytes are there in a character? [closed]
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It depends what is the character and what encoding it is in:
An ASCII character in 8-bit ASCII encoding is 8 bits (1 byte), though it can fit in 7 bits.
An ISO-8895-1 character in ISO-8859-1 encoding is 8 bits (1 byte).
A Unicode char...
sass --watch with automatic minify?
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Why would people downvote this answer? This was exactly what I was searching for in the first place and I am pretty sure I am not the only one because minify compass output Google search leads here.
– Kunok
May 30 '17 at 12:04
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Using a Single Row configuration table in SQL Server database. Bad idea?
...archar)
negative: when dealing with the settings in code, you have to know what type a setting is and cast it
The single row option is by far the easiest one to work with. This is because you can store each setting in its correct type in the database and not have to store the types of the settings ...
base64 encoded images in email signatures
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"like this"... like what? I'm with Faisal, how do you get this into your message?
– Devil's Advocate
Dec 1 '16 at 22:55
1
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_DEBUG vs NDEBUG
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#if !defined(NDEBUG) <-- @HostileFork isn't that what you meant? #if not #ifdef?
– Bob Stein
Apr 5 '19 at 12:52
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How to enter quotes in a Java string?
...our comment after Ian Henry's answer, I'm not quite 100% sure I understand what you are asking.
If it is about getting double quote marks added into a string, you can concatenate the double quotes into your string, for example:
String theFirst = "Java Programming";
String ROM = "\"" + theFirst + "...