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Set the maximum character length of a UITextField
...ed in to itself with an empty string. This will crash because it never actually pasted the string in to itself. It will try to replace a part of the string that doesn't exist.
Fortunately you can protect the UITextField from killing itself like this. You just need to ensure that the range it propose...
Difference between single and double quotes in Bash
... Enclosing characters in double quotes (") preserves the literal value of all characters within the quotes, with the exception of $, `, \, and, when history expansion is enabled, !. The characters $ and ` retain their special meaning within double quotes (see Shell Expansions). The backslash retain...
How to add column if not exists on PostgreSQL?
...statement:
DO $$
BEGIN
BEGIN
ALTER TABLE <table_name> ADD COLUMN <column_name> <column_type>;
EXCEPTION
WHEN duplicate_column THEN RAISE NOTICE 'column <column_name> already exists in <table_name>.';
END;
END;
$$
...
Why is Maven downloading the maven-metadata.xml every time?
Below is the error I usually get when my internet connection is flanky when trying to build a web application with maven.
...
Alternate table row color using CSS?
.... rgb(204, 204, 204)). Read more about it here -> en.wikipedia.org/wiki/Web_colors#Shorthand_hexadecimal_form
– Nick Grealy
May 9 '18 at 14:53
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...
java.net.UnknownHostException: Invalid hostname for server: local
...school network requires some id/pwd authentication first.. Try opening any web url in browser and see if that is properly displayed
– Ash
May 9 '15 at 15:11
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...
Check if a variable is of function type
...unction(functionToCheck) {
return functionToCheck && {}.toString.call(functionToCheck) === '[object Function]';
}
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json.dumps vs flask.jsonify
...dumps() method will just return an encoded string, which would require manually adding the MIME type header.
See more about the jsonify() function here for full reference.
Edit:
Also, I've noticed that jsonify() handles kwargs or dictionaries, while json.dumps() additionally supports lists and oth...
How do you show animated GIFs on a Windows Form (c#)
... showing progress messages as a fairly long process runs. It's a call to a web service so I can't really show a percentage complete figure on a progress bar meaningfully. (I don't particularly like the Marquee property of the progress bar)
...
MLKitTranslator 拓展：离线翻译 · App Inventor 2 中文网
...认 en）、一个输入框、一个按钮、一个标签。
when 按钮_翻译.Click() {
标签1.Text = "翻译中…"
MLKitTranslator1.Translate(文本输入框_输入.Text)
}
when MLKitTranslator1.GotTranslation(originalText, translatedText) {
标签1.Text = translatedText
}
when MLKitTran...