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If I revoke an existing distribution certificate, will it mess up anything with existing apps?
...came back and said, "Just get it done!". So I am wondering how to proceed. If I go into the provisioning portal, and revoke the dist certificate, and then re-assign one, will I then be able to sign the app and upload it without problem?
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Javascript !instanceof If Statement
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Enclose in parentheses and negate on the outside.
if(!(obj instanceof Array)) {
//...
}
In this case, the order of precedence is important (https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Operator_Precedence). The ! operator precedes the instanc...
How to check if field is null or empty in MySQL?
I am trying to figure out how to check if a field is NULL or empty . I have this:
7 Answers
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JavaScript DOM remove element
I'm trying to test if a DOM element exists, and if it does exist delete it, and if it doesn't exist create it.
5 Answers
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Changing Font Size For UITableView Section Headers
...:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
In Swift:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView?
Try something like this:
In Objective-C:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)s...
What is the relative performance difference of if/else versus switch statement in Java?
Worrying about my web application's performances, I am wondering which of "if/else" or switch statement is better regarding performance?
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How to get all possible combinations of a list’s elements?
...t iterable.
Combinations are emitted in lexicographic sort order. So, if the
input iterable is sorted, the
combination tuples will be produced in
sorted order.
Since 2.6, batteries are included!
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Check if a Postgres JSON array contains a string
...d')::jsonb ? 'carrots';
You can even index the ? query on the "food" key if you switch to the jsonb type instead:
alter table rabbits alter info type jsonb using info::jsonb;
create index on rabbits using gin ((info->'food'));
select info->>'name' from rabbits where info->'food' ? 'ca...
How to list the contents of a package using YUM?
...8.0, yum v3.2.29, and repoquery v0.0.11, repoquery -l rpm prints nothing.
If you are having this issue, try adding the --installed flag: repoquery --installed -l rpm.
DNF Update:
To use dnf instead of yum-utils, use the following command:
$ dnf repoquery -l time
/usr/bin/time
/usr/share/doc/ti...
How to check whether a file or directory exists?
...s
func exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil { return true, nil }
if os.IsNotExist(err) { return false, nil }
return false, err
}
Edited to add error handling.
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