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How does Haskell printf work?
... "%d" "hi"
– Travis Sunderland
May 10 '19 at 14:42
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To find whether a column exists in data frame or not
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202
Assuming that the name of your data frame is dat and that your column name to check is "d", you...
Android: How to enable/disable option menu item on button click?
...example_foobar).setEnabled(false);
}
return true;
}
On Android 3.0 and higher, the options menu is considered to always be open when menu items are presented in the action bar. When an event occurs and you want to perform a menu update, you must call invalidateOptionsMenu() to request that...
List all of the possible goals in Maven 2?
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120
The goal you indicate in the command line is linked to the lifecycle of Maven. For example, the ...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
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170
this question is similar to mine:
initialize-preferences-from-xml-in-main-activity
Just use this...
How to show popup message like in Stack Overflow
... {
font-family:Arial,Helvetica,sans-serif;
position:fixed;
top:0px;
left:0px;
width:100%;
z-index:105;
text-align:center;
font-weight:bold;
font-size:100%;
color:white;
padding:10px 0px 10px 0px;
background-color:#8E1609;
}
#message span {
text-al...
How to deserialize a list using GSON or another JSON library in Java?
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edited Jul 15 '16 at 20:56
answered Nov 30 '10 at 21:14
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Getting and removing the first character of a string
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170
See ?substring.
x <- 'hello stackoverflow'
substring(x, 1, 1)
## [1] "h"
substring(x, 2)
## ...
Use-case of `oneway void` in Objective-C?
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edited Oct 14 '17 at 10:22
Josh
1,0611010 silver badges2121 bronze badges
answered Mar 31 '11 at 4:0...
Turn off CSRF token in rails 3
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edited Dec 21 '17 at 22:50
Dorian
17.4k66 gold badges101101 silver badges102102 bronze badges
answered ...