大约有 13,071 项符合查询结果（耗时：0.0327秒） [XML]
Creating a copy of a database in PostgreSQL [closed]
What's the correct way to copy entire database (its structure and data) to a new one in pgAdmin?
20 Answers
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How to recursively download a folder via FTP on Linux [closed]
I'm trying to ftp a folder using the command line ftp client, but so far I've only been able to use 'get' to get individual files.
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Setting unique Constraint with fluent API?
I'm trying to build an EF Entity with Code First, and an EntityTypeConfiguration using fluent API. creating primary keys is easy but not so with a Unique Constraint. I was seeing old posts that suggested executing native SQL commands for this, but that seem to defeat the purpose. is this possible ...
GitHub “fatal: remote origin already exists”
I am trying to follow along Michael Hartl's Rails tutorial but I've run across an error.
19 Answers
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Remove duplicate elements from array in Ruby
I have a Ruby array which contains duplicate elements.
7 Answers
7
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Histogram using gnuplot?
I know how to create a histogram (just use "with boxes") in gnuplot if my .dat file already has properly binned data. Is there a way to take a list of numbers and have gnuplot provide a histogram based on ranges and bin sizes the user provides?
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Get Character value from KeyCode in JavaScript… then trim
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Maybe I didn't understand the question correctly, but can you not use keyup if you want to capture both inputs?
$("input").bind("keyup",function(e){
var value = this.value + String.fromCharCode(e.keyCode);
});
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How to remove all whitespace from a string?
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In general, we want a solution that is vectorised, so here's a better test example:
whitespace <- " \t\n\r\v\f" # space, tab, newline,
# carriage return, vertical tab, form feed
x <- c(
" x y ", # space...
How does database indexing work? [closed]
Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level?
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Detect backspace in empty UITextField
... when the Backspace / Delete key is pressed in the iPhone keyboard on a UITextField that is empty? I want to know when Backspace is pressed only if the UITextField is empty.
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