大约有 43,000 项符合查询结果（耗时：0.0405秒） [XML]
How do you manage databases in development, test, and production?
...elopment, and a maintenance branch for bug fixes, short term enhancements, etc. Inevitably, the need arose to make changes to the schema in the branch. At this point, we already had dbChanges_n+1.sql in the Trunk, so we ended up going with a scheme like the following:
dbChanges_n.1.sql
dbChanges_n...
In C#, what is the difference between public, private, protected, and having no access modifier?
... see here:
Default visibility for C# classes and members (fields, methods, etc.)?
Non-nested
enum public
non-nested classes / structs internal
interfaces internal
delegates in namespace internal
class/struct member(s) p...
How should equals and hashcode be implemented when using JPA and Hibernate
....contains(entity) and you'll get back false. Same goes for get() / put() / etc...
– ChssPly76
Oct 28 '09 at 19:33
Make...
How can I apply a function to every row/column of a matrix in MATLAB?
...n what sort of function you were wanting to apply, the size of the matrix, etc. In short, it is likely problem-dependent. In fact, sometimes a good old for loop can be the fastest choice.
– gnovice
Nov 11 '14 at 14:04
...
Text editor to open big (giant, huge, large) text files [closed]
...its killer features are the columnizer (parse logs that are in CSV, JSONL, etc. and display in a spreadsheet format) and the highlighter (show lines with certain words in certain colors). Also supports file following, tabs, multifiles, bookmarks, search, plugins, and external tools.
Lister (Windows)...
Combine two data frames by rows (rbind) when they have different sets of columns
...d do the following.
# put data.frames into list (dfs named df1, df2, df3, etc)
mydflist <- mget(ls(pattern="df\\d+"))
# get all variable names
allNms <- unique(unlist(lapply(mydflist, names)))
# put em all together
do.call(rbind,
lapply(mydflist,
function(x) data.frame...
Differences in string compare methods in C#
...0
Human-readable match (All other cultures, insensitive case/accent/kana/etc defined by CultureInfo):
string.Compare(strA, strB, myCultureInfo) == 0
Human-readable match with custom rules (All other cultures):
CompareOptions compareOptions = CompareOptions.IgnoreCase
...
How to append one file to another in Linux from the shell?
...
you need to ... chmod 777 /etc/default/docker to give yourself write permissions on that file - be sure to restore the old file permissions once done
– danday74
Mar 9 '16 at 18:54
...
How to link to a named anchor in Multimarkdown?
...on">New section</h2>
It doesn't matter whether it's h1, h2, h3, etc. header, you always refer to it using just one #.
All references in section list should be converted to lowercase text as it is shown in the example above.
The link to the section should be lowercase. It won't work oth...
How to pass command line argument to gnuplot?
...= ARG5+0 # Type coercion required for data series
resulty = 0.02 # fixed
# etc.
This executes perfectly well from command-line in an environment with a recent gnuplot (5.0.3 in my case).
$ ./plotStuff.gp 'output.png' 2.3 6.7 4.3 7
When uploaded to my server and executed, it failed because the s...