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How to write multiple line string using Bash with variables?
...Below mechanism helps in redirecting multiple lines to file. Keep complete string under " so that we can redirect values of the variable.
#!/bin/bash
kernel="2.6.39"
echo "line 1, ${kernel}
line 2," > a.txt
echo 'line 2, ${kernel}
line 2,' > b.txt
Content of a.txt is
line 1, 2.6.39
line 2...
How to clone a case class instance and change just one field in Scala?
...e a method on Persona to simplify usage:
case class Persona(
svcName : String,
svcId : String,
sentMsgs : Set[String]
) {
def plusMsg(msg: String) = this.copy(sentMsgs = this.sentMsgs + msg)
}
then
val newPersona = existingPersona plusMsg newMsg
...
MySQL CONCAT returns NULL if any field contain NULL
...
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS device_name
FROM devices
...
Get all Attributes from a HTML element with Javascript/jQuery
...example, will this include an attribute named 'dataFld' with value 'null' (string value) or would it exclude it?
– mightyiam
Jun 19 '14 at 13:55
...
How can I force Powershell to return an array when a call only returns one object?
...ve a Count property. Single objects (scalar) do not have a Count property. Strings have a length property so you might get false results, use the Count property:
if (@($serverIps).Count -le 1)...
By the way, instead of using a wildcard that can also match strings, use the -as operator:
[array]$s...
How can I remove a key and its value from an associative array?
...:
unset($arr["key2"]);
var_dump($arr);
// output: array(3) { ["key1"]=> string(6) "value1" ["key3"]=> string(6) "value3" ["key4"]=> string(6) "value4" }
To remove element by value:
// remove an element by value:
$arr = array_diff($arr, ["value1"]);
var_dump($arr);
// output: array(2) { ["...
What's the difference between interface and @interface in java?
...f this, you can declare an annotation type
@interface ClassPreamble {
String author();
String date();
int currentRevision() default 1;
String lastModified() default "N/A";
String lastModifiedBy() default "N/A";
// Note use of array
String[] reviewers();
}
which can then anno...
Warning the user/local/mysql/data directory is not owned by the mysql user
...ve</key>
<true />
<key>Label</key>
<string>com.mysql.mysqld</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/mysql/bin/mysqld_safe</string>
<string>--user=mysql</string>
&...
How to validate inputs dynamically created using ng-repeat, ng-show (angular)
...ttempted to use the {{$index}} value to name the inputs, but despite the string literals in HTML appearing correct, it is now working.
...
How to sort an IEnumerable
How can I sort an IEnumerable<string> alphabetically. Is this possible?
4 Answers
...