Welcome to Jonic Developer Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged Why
0
votes
775
views
1
answer
why in c language EOF IS -1?
in c language i am using EOF .....why EOF IS -1 ? why not other value? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
545
views
1
answer
why javascript's charAt() with a string returns the first letter
I am doing some exercises in my object-oriented javascript book, I notice that this: var a = "hello"; a.charAt('e'); // 'h' a.charAt ... this missing bit of information in the question proper Thanks! See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
670
views
1
answer
why cant an Int and a floating point number be added in haskell
why wont this work :- (length [1,2,3,4]) + 3.2 while this works:- 2+3.3 I understand that in the first case the result is an Int+Float but is ... :- Num+Num whereas it does not do that in the first case? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
703
views
1
answer
why do some lines not have semicolon in C#?
I am just trying to figure out the technical reason why in the below some lines do not end with a semicolon but other lines do - what is it about a semicolon ... filePath); **//NEEDS a semicolon** } } } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
840
views
1
answer
why enum could not be resolved in JAVA?
I was using J2EE Eclipse Indigo, and I have three class declare like this: public interface ClassA { public static enum TYPE { TYPE1, TYPE2 }; } public ... May I know what cause the error in this code? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
734
views
1
answer
why is ColdFusion's Epoch Time Dec 30, 1899?
<cfoutput> <cfset x = createTimespan(0,0,0,0)> <cfset epoch = createDateTime(1899,12,30,0,0,0)> <cfset date = epoch + x> #date# #dateFormat(date)# ... 12:00 AM What's so significant about Dec 30, 1899? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
671
views
1
answer
why is maximum single-line length limited to 132 characters in Fortran Standard?
Is it about performance, clean source code, compilers, ...? I know that many compilers allow longer single-line codes. But, if this ... eliminates the maximum line length and continuation limits. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
726
views
1
answer
why foreach is faster than for loop while reading richtextbox lines
There are two ways to read data from RichTextBox line by line 1 ) use a for loop to loop through lines of a richtextBox String s=String.Empty; for ... second to enumerate it. Why is this behaviour there? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
693
views
1
answer
why Javascript SetTimeout() is not multithreaded
I have a test: Html: <div id="f1">Empty</div> <div id="f2">Empty</div> ? js: var s1 = function() { ? ??for (i = 1; i ... why setTimeOut() not run in different threads, instead like event model ? jsfiddle See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
442
views
1
answer
why multiple assignments and single assignments behave differently in python
I was working with queue in python when I had a error in code even while the code looked very perfect to me but latter when I changed assignment style all ... y.get(10) why do both code work differently? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
647
views
1
answer
why can't I ping the external IP address of my Google Compute Engine instance?
I created a Google Compute Engine instance but can not ping its external IP address (173.255.118.164). I can ssh into the instance via gcutil, but ... and just works. What's up with Google ? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
655
views
1
answer
why cant I return data from $.post (jquery)
I must be making a silly mistake but I cannot return the data I get from a $.post function and store it in a variable, not only ... wrong or misunderstanding something. Can someone please help. Thanks See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
1.2k
views
1
answer
why am I not able to run batch file in jenkins pipeline running in windows 10?
I'm trying to run a batchscript present inside the workspace of jenkins. I have written a groovy script as below to do this stage('batchscript') ... window opens up. Any suggestion will be helpfull See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
571
views
1
answer
why does array slice convert javascript arguments to array
Why does applying the slice method to the javascript arguments value as follows Array.prototype.slice.call(arguments) convert it to an array? If slice ... special case when slice is applied to arguments? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
515
views
1
answer
why doesn't this c programme print the first printf statement?
#include<stdio.h> #include <unistd.h> int main(){ while(1) { fprintf(stdout,"hello-out"); fprintf(stderr,"hello-err"); sleep(1); } return 0; ... is that so?Can someone please explain the reason behind it? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
582
views
1
answer
why doesn't this c programme print the first printf statement?
#include<stdio.h> #include <unistd.h> int main(){ while(1) { fprintf(stdout,"hello-out"); fprintf(stderr,"hello-err"); sleep(1); } return 0; ... is that so?Can someone please explain the reason behind it? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
649
views
1
answer
why '?' appears as output while Printing unicode characters in java
While printing certain unicode characters in java we get output as '?'. Why is it so and is there any way to print these characters? This is my ... ()); Output is After insertion... unico?decharacter See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
623
views
1
answer
why null==undefined is true in javascript
If we alert(null==undefined) it outputs to true. What is the logical reason for this. Is this something that is hard coded in javascript or is there an explanation for this. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
590
views
1
answer
why does the redis memory usage not reduce when del half of keys
Redis is used to save data but it costs a lot of memory, and its memory usage up to 52.5%. I deleted half of the keys ... master_last_io_seconds_ago:0 master_sync_in_progress:0 db0:keys=66372158,expires=0 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
516
views
1
answer
why do we prefer ? to ?? operator in c#?
I recently found that we can use ?? operator to check nulls. Please check the below code samples: var res = data ?? new data(); This is exactly ... from recursive & Anton. Its a mistake in careless. :( See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
1.2k
views
1
answer
why --- (3 dashes/hyphen) in yaml file?
So I just started using YAML file instead of application.properties as it is more readable. I see in YAML files they start with ---. I googled ... . Can anyone please explain with a simple example? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
541
views
1
answer
why this code works in C
#include <stdio.h> int main(){ char array[2]; array[0] = 'q'; array[1] = 'a'; printf("%s",array); return 0; } if you ask me this ... string. When i execute it, it works perfectly. Can you explain why? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
504
views
1
answer
why we use <html> tag although my website runs perfect without <html> tag
I need to know what is the use of <html> tag from the beginning of the webpage although website runs perfectly without these <html> </html> tags. I ... is required but why this <html> tag is required. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
529
views
1
answer
why the same color looks different on different android devices
I find lots of colors look different on different android devices. For example, if I set #fff8f5ea as the background color of a View and run the app ... body have the same problem? Does anyone know why? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
625
views
1
answer
why my file permission being changed after pull from git repository
I have been came across this problem over and over again. I have a git repository set up on my remote server and all the files are set to ... 0644 to manually changed my files permission back to normal See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
951
views
1
answer
why does my x axis ticks are not sorted properly in plotly graph
I am trying to plot a sales trend, over the weeks. But in the x axis, the ticks are not in proper sorted order, there by making my graph look weird. Graph ... 415 EGG MASALA 2020-02-24/2020-03-01 50.04 1 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
930
views
1
answer
why android gradle maven publish artifact bundleRelease not found
When i sync project, android studio warn could not get unknown property 'bundleRelease' for object of type org.gradle.api.publish.maven.internal.publication. ... What should i do to set the artifact See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
0
votes
633
views
1
answer
why game is running slow in libgdx?
I am making racing game in Libgdx.My game apk size is 9.92 mb and I am using four texture packer of total size is 9.92 Mb. My game is running ... run on android device very slow. What is reason behind it? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
why
Page:
1
2
3
4
next »
Ask a question:
Welcome to Jonic Developer Community for programmer and developer-Open, Learning and Share
Just Browsing Browsing
[1] 图片能加载却不能是为什么?
[2] php - CORS: header is present but "if" statement negates the header
[3] cpu被iptable、bash进程占满?
[4] javascript - graying out a checkboxes after slecting multiple options and clicking submit
[5] c# - Protected worksheet with Epplus - need to allow filtering and sorting. Sorting not permitted
[6] python - Why can't I import the page.py module in the PageObjects directory?
[7] iview如何实现图片上传
[8] JavaScript 中文字符串之间是怎么比较大小的
[9] 某工程的依赖A中排除另一个依赖B,再在工程本身引入依赖B,会导致A依赖找不到B吗?
[10] how to use webpack-dev-middleware with typescript?
548k
questions
547k
answers
4
comments
46.9k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
google
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
web
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
...