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How to create ENUM type in SQLite?
... Why not use CHECK() constraint to allow only three possible strings?
– mateusza
Jun 19 '13 at 23:31
1
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Remove leading and trailing spaces?
...g something wrong, but I don't know what that is. When I run strip() on a string, I get back a list of strings, not a string.
– Jeff Silverman
Jan 17 '17 at 18:17
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lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...;
void (lua_pushinteger) (lua_State *L, lua_Integer n);
void (lua_pushlstring) (lua_State *L, const char *s, size_t l);
void (lua_pushstring) (lua_State *L, const char *s);
void (lua_pushboolean) (lua_State *L, int b);
void (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
数...
Resolve build errors due to circular dependency amongst classes
...o handle the forward declarations. The only "disadvantage" would be in the extra files. I assume you always include a.fwd.h in a.h, to assure they stay in sync. The example code is missing where these classes are used. a.h and b.h will both need to be included since they won't function in isolatio...
How to remove first 10 characters from a string?
How to ignore the first 10 characters of a string?
12 Answers
12
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Why can Java Collections not directly store Primitives types?
...tion of primitives. Even in the few cases where I might have wanted to the extra time and space costs of using the reference objects has been negligible. In particular I find that many people think they want Map<int,T>, forgetting that an array will do that trick very nicely.
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Equals(=) vs. LIKE
... these operators!
= is a comparison operator that operates on numbers and strings. When comparing strings, the comparison operator compares whole strings.
LIKE is a string operator that compares character by character.
To complicate matters, both operators use a collation which can have important...
Group query results by month and year in postgresql
...ht make sense to use date_trunc, but in some cases having a formatted date string is preferable, and if you're using a performant data warehouse the additional computation might not be a deal breaker. For example, if you are running a quick analytics report using redshift, and it usually takes 3 sec...
Android ACTION_IMAGE_CAPTURE Intent
...reBug() {
// list of known devices that have the bug
ArrayList<String> devices = new ArrayList<String>();
devices.add("android-devphone1/dream_devphone/dream");
devices.add("generic/sdk/generic");
devices.add("vodafone/vfpioneer/sapphire");
devices.add("tmobile/k...
How to convert DateTime to VarChar
...DECLARE @myDateTime DATETIME
SET @myDateTime = '2008-05-03'
--
-- Convert string
--
SELECT LEFT(CONVERT(VARCHAR, @myDateTime, 120), 10)
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