return-value

问题 I've written a very simple code with python tkinter , it contains an input box. I'd like to keep the value inserted by the user to myself, in case I need to use it later. Here's the code: import tkinter as tk root=tk.Tk() root.geometry("600x400") def submit(): name=name_entry.get() return name name_label = tk.Label(root, text = 'Username', font=('calibre', 10, 'bold')) name_entry = tk.Entry(root, font=('calibre',10,'normal')) sub_btn=tk.Button(root,text = 'Submit', command = submit) name

问题 I've written a very simple code with python tkinter , it contains an input box. I'd like to keep the value inserted by the user to myself, in case I need to use it later. Here's the code: import tkinter as tk root=tk.Tk() root.geometry("600x400") def submit(): name=name_entry.get() return name name_label = tk.Label(root, text = 'Username', font=('calibre', 10, 'bold')) name_entry = tk.Entry(root, font=('calibre',10,'normal')) sub_btn=tk.Button(root,text = 'Submit', command = submit) name

问题 I am trying to create a PowerShell [DataTable] class derived from the standard [Data.DataTable] class to ease the creation of data tables: (see also: #11987 Accelerated [DataTable] with easy constructor and AddRow method) class DataTable : Data.DataTable { [ValidateNotNullOrEmpty()][Data.DataTable]$DataTable DataTable([Array]$ColumnNames) { $This.DataTable = New-Object Data.DataTable ForEach ($ColumnName in $ColumnNames) { If ($ColumnName -is [System.Collections.IDictionary]) { ForEach($Key

问题 I am trying to create a PowerShell [DataTable] class derived from the standard [Data.DataTable] class to ease the creation of data tables: (see also: #11987 Accelerated [DataTable] with easy constructor and AddRow method) class DataTable : Data.DataTable { [ValidateNotNullOrEmpty()][Data.DataTable]$DataTable DataTable([Array]$ColumnNames) { $This.DataTable = New-Object Data.DataTable ForEach ($ColumnName in $ColumnNames) { If ($ColumnName -is [System.Collections.IDictionary]) { ForEach($Key

问题 I have the following example of rows in a MySQl table Column A Row1 Lauguage=English&Country=USA&Gender=Male Row2 Gender=Female&Language=French&Country= Row3 Country=Canada&Gender=&Language=English How can I achieve the following: For example, I need to look for Country I need to locate the position of Country in this text column. This changes from row to row. I need to then ignore the parameter 'Country=' and only extract the value. In some cases this will be NULL (like example in Row2)

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 9 days ago . Improve this question i experienced this questions in a during the job interview, but i cant answered it and i cant find the answer after. They asked me 'Why methods return just one kind of parameter in normal conditions in C#? (ref-out is extra way to return multiple

问题 Whenever I run the following code, and give input as long string it gets exited with the return value 3221226356 #include<stdio.h> #include<stdlib.h> #include<string.h> int main() { int i=0; char c,*input; input=(char *)malloc(sizeof(char)); if(input==NULL) { printf("Could not allocate memory"); exit(1); } printf("%d size",strlen(input)); printf("Enter the string: "); while((c=getchar())!='\n') { realloc(input, (sizeof(char))); input[i++]=c; } printf("%s",input); } 回答1: The realloc function

问题 This question already has answers here : Python - is there a “don't care” symbol for tuple assignments? (9 answers) Closed last month . def get(): ... ... return x,y,z a,b,c = get() i don't need b, c is there a solution to ignore them ( something like don't care ) 回答1: The recommended way of doing this is to use the _ variable name, as indicated by Abdul Niyas P M, this will not store the values captured by the _. x, _, z = 1, 2, 3 # if x and z are necessary # or x, *_ = 1, 2, 3 # if only x

问题 Unlike Java, in C/C++ following is allowed : int* foo () { if(x) return p; // what if control reaches here } This often causes crashes and hard to debug problems. Why standard doesn't enforce to have final return for non- void functions ? (Compilers generate error for wrong return value) Is there any flag in gcc/msvc to enforce this ? (something like -Wunused-result ) 回答1: It is not allowed (undefined behaviour). However, the standard does not require a diagnostic in this case. The standard

问题 I've written a user defined function and want to change the font format of a defined character range, of the return value. It doesn´t seem to work the way i expekt, for cells with functions "= ..." . I only got 2 scenarios, first formated the whole return value and second doesn't format anything. For "normal" cells, is works, as you can see in the screenshot. try to change font format of first char to purple: top cell with function, botton cell without function: Anyone have an idea, how to do