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DROP IF EXISTS VS DROP?
...lly good idea for one to use CASCADE within a transaction block (BEGIN ... COMMIT). This way it is clear how the database will be affected before potentially clobbering a bunch of data you may not have wanted to.
– jbowman
Apr 21 '15 at 17:57
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Add querystring parameters to link_to
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link_to can also produce links with anchors or query strings:
link_to "Comment wall", profile_path(@profile, :anchor => "wall")
#=> <a href="/profiles/1#wall">Comment wall</a>
link_to "Ruby on Rails search", :controller => "searches", :query => "ruby on rails"
#=> <...
differences in application/json and application/x-www-form-urlencoded
...anding is using JSON as contentType helps when the data to be sent is more complex and involves a lot of hierarchy.. whereas form encoded is good to send simple params in url which can be read at the backend without to much code... I guess this answers the why part of it.
– Ank...
How to include file in a bash shell script
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Simply put inside your script :
source FILE
Or
. FILE # POSIX compliant
$ LANG=C help source
source: source filename [arguments]
Execute commands from a file in the current shell.
Read and execute commands from FILENAME in the current shell. The
entries in $PATH are used to find the...
The written versions of the logical operators
...igured the website was wrong, but it is NetBeans which is wrong because it compiled and ran as expected.
4 Answers
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UIView's frame, bounds, center, origin, when to use what?
...frame. A good discussion of this can be found at the link below. It is uncommon for this property to be manipulated unless there is specific need to adjust the drawing region. The only exception is that most programs will use the [[UIScreen mainScreen] bounds] on startup to determine the visible ...
is there a require for json in node.js
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Is this true? It's not working for me, and github.com/joyent/node/issues/1357 and github.com/joyent/node/pull/584 suggest it shouldn't.
– user161642
Oct 19 '12 at 19:38
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make arrayList.toArray() return more specific types
...>();
String[] a = list.toArray(new String[0]);
Before Java6 it was recommended to write:
String[] a = list.toArray(new String[list.size()]);
because the internal implementation would realloc a properly sized array anyway so you were better doing it upfront. Since Java6 the empty array is pr...
For files in directory, only echo filename (no path)
... -printf: unknown primary or operator => unix.stackexchange.com/a/272493/72893
– Nobita
Jul 12 '18 at 11:10
2
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Why does writeObject throw java.io.NotSerializableException and how do I fix it?
... edited Jun 2 '19 at 9:14
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answered Dec 15 '12 at 20:26
BozhoBozho
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