大约有 33,000 项符合查询结果（耗时：0.0475秒） [XML]
What's the Point of Multiple Redis Databases?
... separate databases as I sometimes need to make use of the keys command on one specific kind of data, and wanted to separate it to make that faster.
...
What's the best visual merge tool for Git? [closed]
...author is using?, the question is general enough to be of interest to everyone who looks for it. And 3-way diff is when you actually see 4 panes with test; merge-base/local/remote/result
– Evgeny
Jan 23 '11 at 13:16
...
Validate that a string is a positive integer
...ately represent which parses as closer to a different value than the given one (which includes many integers over 9,007,199,254,740,992; for instance, 1234567890123456789 will fail). The former is an easy fix, the latter two not so much.
Regular Expression
The other approach is to test the charact...
Difference between local and global indexes in DynamoDB
...h+range6.
You get 5 more range attributes to query on.
Also, there is only one provisioned throughput.
Global Secondary Indexes defines a new paradigm - different hash/range keys per index.
This breaks the original usage of one hash key per table.
This is also why when defining GSI you are required...
urlencode vs rawurlencode?
...ther systems is important then it seems rawurlencode is the way to go. The one exception is legacy systems which expect the query string to follow form-encoding style of spaces encoded as + instead of %20 (in which case you need urlencode).
rawurlencode follows RFC 1738 prior to PHP 5.3.0 and RFC 3...
Switch on Enum in Java [duplicate]
... on an enum type, then instead of writing a switch, just call the method - one line of code: done!
enum MyEnum {
SOME_ENUM_CONSTANT {
@Override
public void method() {
System.out.println("first enum constant behavior!");
}
},
ANOTHER_ENUM_CONSTANT {
...
What is the difference between buffer and cache memory in Linux?
...me) which would tell us if dirty blocks are counted differently than clean ones. Linux will certainly cache both types (lru as mentioned in the question) but one is far more serious in terms of memory pressure.
– Seth Robertson
Sep 26 '18 at 12:23
...
How to check if a column exists in a SQL Server table?
...
In Martin Smith's version, one thing to mention is not to include columnName within square brackets [ ]. When columnName is inside square brackets [ ], it'll give null even if the column exists in the table
– Hemendra
...
DateTime.Now vs. DateTime.UtcNow
...actly are the principles of how the two properties work. I know the second one is universal and basically doesn't deal with time zones, but can someone explain in detail how they work and which one should be used in what scenario?
...
How can I clear the SQL Server query cache?
...
One maight also include DBCC FREEPROCCACHE
– jaraics
Sep 28 '11 at 7:42
1
...