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Is the primary key automatically indexed in MySQL?
...
I guess this is the answer
mysql> create table test(id int primary key, s varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> show indexes from test \G
*************************** 1. row ***************************
Table: test
Non_unique: 0
Key_n...
Check if a string has white space
...hasWhiteSpace(s) {
return s.indexOf(' ') >= 0;
}
Or you can use the test method, on a simple RegEx:
function hasWhiteSpace(s) {
return /\s/g.test(s);
}
This will also check for other white space characters like Tab.
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Regular Expression to find a string included between two characters while EXCLUDING the delimiters
...rk if the substring also contains the delimiters? For example in This is a test string [more [or] less] would this return more [or] less ?
– gnzlbg
Feb 22 '13 at 18:49
1
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Strengths of Shell Scripting compared to Python [closed]
...rite a simple shell loop to do a number of operations using commands like "test" and "expr" and compare the run times with a Python script that uses the "os" module. Commands like test and expr often involve forking a subprocess to do the real work.
– S.Lott
A...
Why does Lua have no “continue” statement?
... a=1 --change outer a
end
local a=f() -- inner a
until a==0 -- test inner a
The declaration of local a inside the loop body masks the outer variable named a, and the scope of that local extends across the condition of the until statement so the condition is testing the innermost a.
If...
How to get primary key column in Oracle?
...ere I created a table for get primary key column in oracle which is called test and then query
create table test
(
id int,
name varchar2(20),
city varchar2(20),
phone int,
constraint pk_id_name_city primary key (id,name,city)
);
SELECT cols.table_name, cols.column_name, cols.position, cons.status,...
Assign variable in if condition statement, good practice or not? [closed]
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The last example doesn't work, however, if you're testing for fail/success of a function that returns a boolean. In other words, while if (resultArr = myNeedle.exec(myHaystack)) {...} works, if ((resultArr = myNeedle.exec(myHaystack)) === true) {...} does not because the as...
Hudson or Teamcity for continuous integration? [closed]
...changed. You can commit from the IDE to the CI server, run the comile and tests on the build grid, and then the CI server will commit if the build is successful. You can click on build reports in the CI web app and it will open the appropriate files in the IDE.
There are plugins available (I wrot...
Can a C# lambda expression have more than one statement?
... support that. It could, but that would require more design/implementation/test work.
– Jon Skeet
Jan 3 '18 at 8:43
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How do I rename the android package name? [duplicate]
...to rename the last directory.
For example , in the project com.example.test it will offer to rename test only. The same applies if I navigate to package name in .java or Manifest file and press Shift+F6.
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