Recent questions tagged Why

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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)

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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"; ... 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)

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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 ... 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)

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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 ... a semicolon** } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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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 ... 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)

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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 ... 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)

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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 ... length and continuation limits. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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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 ... 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)

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why Javascript SetTimeout() is not multithreaded

I have a test: Html: <div id="f1">Empty</div> <div id="f2">Empty</div> ? js: var s1 = ... 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)

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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 ... 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)

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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 ... . 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)

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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 ... . 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)

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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 ... 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)

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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 ... applied to arguments? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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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( ... 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)

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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( ... 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)

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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 ... After insertion... unico?decharacter See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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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 ... 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)

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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 ... :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)

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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 = ... 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)

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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 ... 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)

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why this code works in C

#include <stdio.h> int main(){ char array[2]; array[0] = 'q'; array[1] = 'a'; printf("%s",array) ... , 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)

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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 ... 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)

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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 ... ? Does anyone know why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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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 ... 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)

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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, ... -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)

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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. ... 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)

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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 ... 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)

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