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How to select where ID in Array Rails ActiveRecord without exception
...ns => ["approved and id in (?)", [1,2,3]])
– Omar Qureshi
Sep 18 '09 at 8:23
14
this will be d...
Delete directories recursively in Java
...e code that erickson provided in his answer.
– paweloque
Apr 22 '09 at 22:42
14
It's a little mor...
Can a pointer to base point to an array of derived objects?
...
You cannot index like that. You have allocated an array of Rectangles and stored a pointer to the first in shapes. When you do shapes[1] you're dereferencing (shapes + 1). This will not give you a pointer to the next Rectangle, but a po...
Boolean Field in Oracle
...r using Y and NULL as the values. This makes for a very small (read fast) index that takes very little space.
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How to slice an array in Bash
...rns the contents of the array, :1:2 takes a slice of length 2, starting at index 1.
A=( foo bar "a b c" 42 )
B=("${A[@]:1:2}")
C=("${A[@]:1}") # slice to the end of the array
echo "${B[@]}" # bar a b c
echo "${B[1]}" # a b c
echo "${C[@]}" # bar a b c 42
echo "${C[@]...
Java: how to convert HashMap to array
...ys = new String[map.size()];
Object[] values = new Object[map.size()];
int index = 0;
for (Map.Entry<String, Object> mapEntry : map.entrySet()) {
keys[index] = mapEntry.getKey();
values[index] = mapEntry.getValue();
index++;
}
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How to get a value from a cell of a dataframe?
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@AtteJuvonen That depends if you have duplicates in your index/columns (note at/iat raises an exception with duplicate columns, will file an issue).
– Andy Hayden
Feb 6 '17 at 19:30
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I forgot the password I entered during postgres installation
...find the file pg_hba.conf - it may be located, for example in /etc/postgresql-9.1/pg_hba.conf.
cd /etc/postgresql-9.1/
Back it up
cp pg_hba.conf pg_hba.conf-backup
place the following line (as either the first uncommented line, or as the only one):
For all occurrence of below (local and host)...
How to remove focus around buttons on click
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I found this Q and A on another page, and overriding the button focus style worked for me. This problem may be specific to MacOS with Chrome.
.btn:focus {
outline: none;
box-shadow: none;
}
Note though that this has implications fo...
Make elasticsearch only return certain fields?
I'm using elasticsearch to index my documents.
12 Answers
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