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Why a function checking if a string is empty always returns true? [closed]
I have a function isNotEmpty which returns true if the string is not empty and false if the string is empty. I've found out that it is not working if I pass an empty string through it.
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How can I determine if a variable is 'undefined' or 'null'?
How do I determine if variable is undefined or null ?
30 Answers
30
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...态处理
when UrsPahoMqttClient1.ConnectionStateChanged newState
do
if newState = 1 then // 连接成功
set CurrentRetry to 0
set Label_ConnectionStatus.Text to "已连接 - 在线"
set Label_ConnectionStatus.TextColor to Green
call subscribeToAllTopics
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Algorithm for Determining Tic Tac Toe Game Over
...ixed number of moves in a draw tic-tac-toe game once the last move is made if it wasn't a winning move it's by default a draw game.
edit: this code is for an n by n board with n in a row to win (3x3 board requries 3 in a row, etc)
edit: added code to check anti diag, I couldn't figure out a non lo...
How can I find WPF controls by name or type?
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There is a small error in Tri Q's Algorithm. After the child is found, if childrenCount is > 1 and we iterate again we can overwrite the properly found child. Therefore I added a if (foundChild != null) break; into my code to deal with this condition.
/// <summary>
/// Finds a Child o...
Python: Checking if a 'Dictionary' is empty doesn't seem to work
I am trying to check if a dictionary is empty but it doesn't behave properly. It just skips it and displays ONLINE without anything except of display the message. Any ideas why ?
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Check if a Python list item contains a string inside another string
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If you only want to check for the presence of abc in any string in the list, you could try
some_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456']
if any("abc" in s for s in some_list):
# whatever
If you really want t...
How can I check if a string is null or empty in PowerShell?
Is there a built-in IsNullOrEmpty -like function in order to check if a string is null or empty, in PowerShell?
11 Answers...
How can I check if string contains characters & whitespace, not just whitespace?
What is the best way to check if a string contains only whitespace?
9 Answers
9
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Using JQuery to check if no radio button in a group has been checked
I'm sitting with a problem, I need to check with JQuery if no radio button within a radio button group has been checked, so that I can give the users an javascript error if they forgot to check a option.
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