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iOS application: how to clear notifications?
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Update for iOS 10 (Swift 3)
In order to clear all local notifications in iOS 10 apps, you should use the following code:
import UserNotifications
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if #available(iOS 10.0, *) {
let center = UNUserNotificationCenter.current()
center.removeAllPe...
Set ImageView width and height programmatically?
... So, how to specify the unit? How to say that it's dp, not sp, etc.
– Saeed Neamati
Sep 3 '15 at 9:37
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Rails Migration: Remove constraint
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In Rails 4+ in order to remove not-null constraint, you can use change_column_null:
change_column_null :users, :address, true
share
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im...
How to compare two floating point numbers in Bash?
... then
echo "${FOO} > ${BAR}";
else
echo "${FOO} <= ${BAR}";
fi
Order of logical operators matters. Integer parts are compared as numbers and fractional parts are intentionally compared as strings. Variables are split into integer and fractional parts using this method.
Won't compare flo...
Why does ConcurrentHashMap prevent null keys and values?
...re is other sorts of locking done. That's what makes it "Concurrent". In order to do that, it needs an Object to hang on.
– Paul Tomblin
Mar 30 '09 at 19:26
2
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python pandas dataframe to dictionary
....T.to_dict('records')
If you have multiple values, like val1, val2, val3,etc and u want them as lists, then use the below code:
df.set_index('id').T.to_dict('list')
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How do I analyze a .hprof file?
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Some of what you can do is mind-blowingly good for finding memory leaks etc -- including running a form of limited SQL (OQL) against the in-memory objects, i.e.
SELECT toString(firstName) FROM com.yourcompany.somepackage.User
Totally brilliant.
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Naming “class” and “id” HTML attributes - dashes vs. underlines [closed]
...selectors by any characters (including none at all) other than hyphens, in order to improve understanding and scannability.
/* Not recommended: does not separate the words “demo” and “image” */
.demoimage {}
/* Not recommended: uses underscore instead of hyphen */
.error_status {}
/* Reco...
Can Android do peer-to-peer ad-hoc networking?
...u can connect your android device to a known ad-hoc network.
edit /system/etc/wifi/tiwlan.ini
WiFiAdhoc = 1
dot11DesiredSSID = <your_network_ssid>
dot11DesiredBSSType = 0
edit /data/misc/wifi/wpa_supplicant.conf
ctrl_interface=tiwlan0
update_config=1
eapol_version=1
ap_scan=2
if that ...
What does mvn install in maven exactly do
...he JAR, WAR or EAR), its POM and any attached artifacts (sources, javadoc, etc) produced by a particular project.
— Apache Maven Install Plugin - Introduction.
For additional details on the goal, please refer to the Apache Maven Install Plugin - install:install page.
For additional details...