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How to remove the first and the last character of a string
...ring = "/installers/";
var result = yourString.substring(1, yourString.length-1);
console.log(result);
Or you can use .slice as suggested by Ankit Gupta
var yourString = "/installers/services/";
var result = yourString.slice(1,-1);
console.log(result);
Documentation for ...
Can I try/catch a warning?
...e but please use it with care.
bob@mypc:~$ php -a
Interactive shell
php > echo @something(); // this will just silently die...
No further output - good luck debugging this!
bob@mypc:~$ php -a
Interactive shell
php > echo something(); // lets try it again but don't suppress the error
PHP ...
Get file name and extension in Ruby
... your purpose:
path = "/path/to/xyz.mp4"
File.basename(path) # => "xyz.mp4"
File.extname(path) # => ".mp4"
File.basename(path, ".mp4") # => "xyz"
File.basename(path, ".*") # => "xyz"
File.dirname(path) # => "/path/to"
...
MISCONF Redis is configured to save RDB snapshots
...
127.0.0.1:6379> CONFIG SET dir /root/tool (error) ERR Changing directory: Permission denied
– Gank
Aug 29 '19 at 12:28
...
scanf() leaves the new line char in the buffer
...() before calling second scanf().
scanf("%c", &c1);
getchar(); // <== remove newline
scanf("%c", &c2);
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Android emulator shows nothing except black screen and adb devices shows “device offline”
...the Launch Options fixed it for me.
Go to Android Virtual Device Manager->Select your device->Start->Check "Wipe user data"->Launch
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Can't connect Nexus 4 to adb: unauthorized
...omething else (for other devices). This option is usually under Settings -> Storage. Then connect the device again, you'll get the authorization dialog.
MTP has been known to interfere with USB debugging -- these two did not work together at all on majority of older devices. Nexus 7 and many new...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
...'s what you want then you don't actually need the -z non-empty check:
pax> VAR=xyzzy
pax> if [[ -e $VAR ]] ; then echo yes ; fi
pax> VAR=/tmp
pax> if [[ -e $VAR ]] ; then echo yes ; fi
yes
In other words, just use:
if [[ -e "$var" ]] ; then
echo "'$var' exists"
fi
...
How to change the foreign key referential action? (behavior)
... t2 (something like below in my diagram).
table1 [ fk_table2_id ] --> table2 [t2]
First step, DROP old CONSTRAINT: (reference)
ALTER TABLE `table1`
DROP FOREIGN KEY `fk_name`;
notice constraint is deleted, column is not deleted
Second step, ADD new CONSTRAINT:
ALTER TABLE `ta...
Cast Double to Integer in Java
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Any double value > 2^31 - 1 (Integer.MAX_VALUE) will overflow.
– anubhava
Oct 3 '14 at 4:41
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